Electronic Information System for International Law

http://www.eisil.org/

International Law Institute

http://www.ili.org/

International Law, HierosGamos.org

http://www.hg.org/international-law.html

and International Law Articles, HierosGamos.org

http://www.hg.org/law-articles-international-law.asp

International Law, Cornell Legal Information Institute

http://www.law.cornell.edu/wex/international_law

Duke Journal of Comparative and International Law

http://scholarship.law.duke.edu/djcil/

Sources of International Law, Northwestern Law, Pritzker Legal Resource Center

http://www.law.northwestern.edu/library/research/international/gettingstarted/sourcesofintllaw/