Voir la notice de l'article provenant de la source Sociedad Colombiana de Matemáticas
@article{RCM_2015_49_2_a3, author = {Christian Pommerenke and Margarita Toro}, title = {Free subgroups of the parametrized modular group}, journal = {Revista colombiana de matematicas}, pages = {269--279}, publisher = {mathdoc}, volume = {49}, number = {2}, year = {2015}, url = {http://geodesic.mathdoc.fr/item/RCM_2015_49_2_a3/} }
Christian Pommerenke; Margarita Toro. Free subgroups of the parametrized modular group. Revista colombiana de matematicas, Tome 49 (2015) no. 2, pp. 269-279. http://geodesic.mathdoc.fr/item/RCM_2015_49_2_a3/