A) Books
1. Ávila, Humberto Bergmann (2016), Certainty in Law. Berlin, Springer.
2. Black, Henry Campbell, Bryan A Garner & Becky R McDaniel (1999), Black's law dictionary. St. Paul, West Group Publication.
3. Borjars, Juris (2014), Protection of Interests of The International Community in the Law of State Responsibility, Latvia, Faculty of law, University of Latvia.
4. Claes, Erik & Bert Keirsbilck. (2009), "Facing the limits of the law", In Facing the Limits of the Law, Edited by Erik Claes, Berlin, Springer.
5. De Visscher, Charles, (2015), Theory and reality in public international law: Princeton, Princeton University Press.
6. Hart, Herbert. L. A. (1961), The concept of law, Oxford,Clarendon Press.
7. Kagan, Shelly (1989), The limits of morality, Oxford, Oxford University Press.
8. Kelsen, Hans (1944), Peace through law,Chapel Hill, North Carolina University Press The Lawbook Exchange, Ltd.
9. Lauterpacht, Hersch (2011), The function of law in the international community: Oxford, Oxford University Press.
10. Widlak, Tomasz Hubert (2015), From International Society to International Community: The Constitutional Evolution of International Law. Gdansk, University of Gdansk.
11. Thompson, Mell (2017), Philosophy, Translated into Persian by Behrooz Hasani, Farhang Nashre No Publication .
12. Falsafi, Hedayatollah (2012), International Treaty Law, (3rd Edition), Tehran, Farhang Nashre Now Publication.
13. Falsafi, Hedayatollah (2011), Perpetual Peaceand Rule of Law: Dialectic of Difference and Likelihood, Tehran, Farhang Nashre Now Publication.
14. Falsafi, Hedayatollah (2017), Movement of Rationality in International Law System, Principles of Methodology of International Law, Tehran, Farhang Nashre Now Publication.
B) Articles
15. Fontanelli, Filippo (2011), "Santi Romano and L'ordinamento giuridico: The Relevance of a Forgotten Masterpiece for Contemporary International, Transnational and Global Legal Relations", Transnational Legal Theory , Vol.2 , pp.67-117.
16. Maxeiner, James R. (2008), "Some realism about legal certainty in the globalization of the rule of law", Houston Journal of International Law, Vo.31, pp.27-46.
17. Mousavi Seyed Fazllolah & Khalaf Rezaei Hossein (2015), “Peremptory Norms in International Law; Development or Revolution of Sources of International Law (A Comparative Analysis of National Legal Systems)” Comparative Law Studies Journal, Vol.6, No.1, pp.369-391.
18. Rigaux, Francois (1998), "Hans Kelsen on international law", European Journal of International Law ,Vol.9 , pp.325-343.