Voir la notice de l'article provenant de la source Bulgarian Digital Mathematics Library
@article{SMJ2_1996_22_1_a5, author = {Gizatullin, Marat}, title = {Generalizations of {Cole's} {Systems}}, journal = {Serdica Mathematical Journal}, pages = {45--56}, publisher = {mathdoc}, volume = {22}, number = {1}, year = {1996}, language = {en}, url = {http://geodesic.mathdoc.fr/item/SMJ2_1996_22_1_a5/} }
Gizatullin, Marat. Generalizations of Cole's Systems. Serdica Mathematical Journal, Tome 22 (1996) no. 1, pp. 45-56. http://geodesic.mathdoc.fr/item/SMJ2_1996_22_1_a5/