@book{51149,
	author = {Roubier, Paul},
	title = {Les Conflits De Lois Dans Le Temps (Théorie Dite De La Non-rétroactivité Des Lois). },
	publisher = {Librairie du Recueil Sirey,},
	year = {1929.},
	address = {Paris :},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B12-01392.pdf}
}