Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1985__26_2_a5, author = {Loebl, Martin}, title = {Hercules and {Hydra,} a game on rooted finite trees}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {259--267}, publisher = {mathdoc}, volume = {26}, number = {2}, year = {1985}, mrnumber = {803922}, zbl = {0565.90090}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1985__26_2_a5/} }
Loebl, Martin. Hercules and Hydra, a game on rooted finite trees. Commentationes Mathematicae Universitatis Carolinae, Tome 26 (1985) no. 2, pp. 259-267. http://geodesic.mathdoc.fr/item/CMUC_1985__26_2_a5/