Databases

• Investment Arbitration Reporter (IAReporter)
  News and analysis service focusing on international arbitrations between foreign investors and their host governments. Covers international investment claims, legal rulings, and policy developments and offers reports on the very latest legal pleadings, decisions, and arbitral awards.
• Investor-State LawGuide (ISLG) - Jurisprudence Citator
  Provides access to treaties, rules of arbitration, decisions and awards, and other related documents. Use the specialized research tools to search on subject, articles, jurisprudence or do a full-text search.
• KluwerArbitration
  Offers full-text access to a collection of journals and books from Kluwer Law International on arbitration, as well as on international investment agreements (IIAs, including BITs and TIPa) and related case law, conventions, legislation, treaties, news, and more.
• Nexis Uni
  Database that contains international law reviews and journals, case law, legal news, statutes and legislation, administrative codes and regulations, and directories.
• UNCTAD’s Investment Policy Hub
  Includes case law, international investment agreements (IIAs, including BITs and TIPs) investment-related instruments (IRIs), model agreements and draft instruments, multilateral conventions on dispute settlement and arbitration rules, and documents adopted by international organisations.
• Westlaw - Arbitration Materials
  Contains international arbitration cases from EU, Hong Kong, UK and US, awards and rules from CPR, ICSID, ICC, NAFTA, the Permanent Court of Arbitration, The Iran-United States Claims Tribunal, WIPO, WTO/GATT etc., and numerous relevant conventions and international investment agreements.
• WorldTradeLaw.net
  Offers free access to current trade news and resources and a full-text search engine for WTO decisions. The subscription service, Dispute settlement commentary (DSC), provides a summary and analysis of all WTO dispute settlement decisions.
• WTO/Dispute Settlement Body
  Access to official documents, legal texts, GATT documents, disputes, reports and publications.

Journals

• Arbitration International
• Brill Research Perspectives in International Investment Law and Arbitration
• European Journal of International Law
• ICSID Review
• Journal of International Arbitration
• Journal of International Dispute settlement
• Journal of International Economic Law
• Journal of World Investment and Trade
• Journal of World Trade
• Kluwer Arbitration Journals
• Legal Issues of economic integration
• Leiden Journal of International Law

See also the additional list of journals under Economic law and the guide Legal literature - articles and journals.

(Text)books

• Applicable law in investor-state arbitration the interplay between national and international law / H. E. Kjos (2013)
• Arbitration under international investment agreements: a guide to the key issues / ed. K. Yannaca-Small (2nd ed. 2018)
• Domestic law in international investment arbitration / J. Hepburn (2017)
•  EU trade law / R. Leal-Arcas (2019)
• The European Union and international dispute settlement / ed. by M. Cremona (2017)
• Evidence in international investment arbitration / F. G. Sourgens, I. A. Laird (2018)
• Foreign investment disputes: cases, materials, and commentary / R. Doak Bishop, J. Crawford (2nd ed. 2014)
• General principles of law and international investment arbitration / A. Gattini, A. Tanzi and F. Fontanelli (2018)
• A guide to general principles of law in international investment arbitration / P. Dumberry (2020)
• A handbook on the WTO dispute settlement system / prep. by the Legal Affairs Division and the Rules Division of the WTO Secretariat, and the Appellate Body Secretariat (2nd ed. 2017)
• International dispute settlement / J.G. Merrills  (6th ed. 2017)
• International investment arbitration: substantive principles / C. McLachlan, L. Shore (2nd ed. 2017)
• International investment law / A. de Nanteuil (2020)
• International investment law: a handbook / ed. M. Bungenberg (2015)
• International investment law and general international law: radiating effects? / ed. C. Tams, S. Schill, R. Hofmann (2023)
• International investment law: reconciling policy and principle / S.P. Subedi (4th ed. 2020)
• International investment law: text, cases and materials / K. Nadakavukaren Schefer  (3rd ed. 2020)
• The international law on foreign investment / M. Sornarajah (5th ed. 2021)
• International protection of investments: the substantive standards / A. Reinisch, C. Schreuer (2020)
• International trade law / I. Carr; P. Stone (6th ed. 2018)
• Investment protection standards and the rule of law / ed. A. Reinisch, S.W. Schill (2023)
• An introduction to international investment law / D. Collins (2017)
• Law of investment treaties / J.W. Salacuse (3rd ed. 2021)
• Litigating international investment disputes: a practitioner’s guide / ed. Ch. Giorgetti (2014)
• The multilateralization of international investment law / S.W. Schill (2009)
• The Oxford handbook of international arbitration / T. Schultz, F. Ortino (2020)
• Principles of international investment law / R. Dolzer, U. Kriebaum, Chr. Schreuer (3rd ed. 2022)
• Regional trade agreements and the multilateral trading system / ed. R. Acharya (2016)
• The regulation of international trade: Vol. 1 and Vol. 2 / P. C. Mavroidis (2016)
• The rule of law at the national and international levels: contestations and deference / ed. by M. Kanetake and A. Nollkaemper (2016)
• The WTO and international investment law: converging systems / J. Kurtz (2016)
• The WTO dispute settlement system / P. Mavroidis (2022)

Commentaries

• Foreign investment disputes: cases, materials, and commentary / R. Doak Bishop, J. Crawford, M. W. Reisman (2nd ed. 2014)
• The ICSID Convention: a commentary / Christoph H. Schreuer  (2nd ed. 2009)
• UNCITRAL arbitration / J. Paulsson, G. Petrochillos (2018)
• UNCITRAL arbitration rules: a commentary / D.D. Caron, L.M. Caplan (2nd ed. 2013)
• UNCITRAL Model Law on International commercial arbitration / I. Bantekas, P. Ortolani (2020)
• World trade law: text, materials, and commentary / S. Lester, B. Mercurio and A.Davies (3rd ed. 2018)

Encyclopedias

• Max Planck Encyclopedias of International Law

Case law

• CLOUT - Case Law on UNCITRAL Texts
• ICC Dispute Resolution Library
• IACL - International Arbitration Case Law
• International Centre for Settlement of Investment Disputes (ICSID) - case law database
• International Court of Justice
• International Energy Charter
• Investment Arbitration Reporter - reports on the latest legal pleadings, decisions and arbitral awards
• Investor-State LawGuide  (ISLG) - Jurisprudence Citator
• Oxford Public International Law
• Permanent Court of Arbitration
• Reports of International Arbitral Awards
• WTO - Dispute Settlement / Find dispute cases

Official documents

• A guide to the 2006 Amendments to the UNCITRAL Model Law on International Commercial Arbitration
• History of the ICSID Convention: Vol I - IV
• ICSID Database of Bilateral Investment Treaties
• Nafta - Legislative History (via Westlaw)
• New York Arbitration Convention
• UNCITRAL Model Law
• Vienna Convention on the Law of Treaties
• WTO/GATT - Documents and resources

Legislation and treaties

• ICSID Convention - Convention on the Settlement of Investment Disputes between States and Nationals of Other States
• ICSID - Database of Bilateral Investment Treaties
• KluwerArbitration - Bilateral Investment Treaties
• KluwerArbitration - Multilateral Investment Treaties (Conventions)
• New York Arbitration Convention
• UNCTAD: International Investment Agreements
• Westlaw - International Arbitration: Bilateral Treaties
• WTO – legal texts

Miscellaneous

• CMS Guide to arbitration
• Georgetown Law Library - International Investment Law Research Guide
• Georgetown Law Library - International Trade Law Research Guide
• Globalex - International Arbitration between Foreign Investors and Host states
• ICCA - International Council for Commercial Arbitration   
• International Investment Law Center Cologne
• ITALAW - includes investor-state arbitration jurisprudence, investment treaties, EU documents, and other relevant publications
• OECD - International investment law
• Oxford Bibliography on International Law - International Investment Arbitration and Expropriation in International Investment Law
• Oxford University Press - Investment Claims
• Peace Palace Library - International Arbitration, Foreign Direct Investment, Settlement of International Disputes and World Trade Organization (WTO)
• UN Audiovisual Library of International Law - relevant lectures, e.g. international economic law