@book{64002,
	author = {Vierdag, E. W},
	title = {The Concept of Discrimination in International Law : },
	publisher = {Martinus Nijhoff,},
	year = {1973.},
	address = {Amsterdam : },
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B11-00291.pdf}
}