Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_1987_17_1a_13, author = {Vojvodi\'c Gradimir and \v{S}e\v{s}elja Branimir}, title = {L-valued congruences and {L-valued} normal subgroups}, journal = {Novi Sad Journal of Mathematics}, pages = {201-207}, publisher = {mathdoc}, volume = {17}, number = {1}, year = {1987}, url = {http://geodesic.mathdoc.fr/item/NSJOM_1987_17_1a_13/} }
Vojvodić Gradimir; Šešelja Branimir. L-valued congruences and L-valued normal subgroups. Novi Sad Journal of Mathematics, Tome 17 (1987) no. 1. http://geodesic.mathdoc.fr/item/NSJOM_1987_17_1a_13/