@book{61237,
	author = {Level, Patrice },
	title = {Essai sur les conflits de lois dans le temps :},
	publisher = {Jurisprudence,},
	year = {1959.},
	address = {Paris :},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B12-02385.pdf}
}