@article{106600, author = {Martin Loebl}, title = {Hercules and Hydra}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {029}, year = {1988}, pages = {85-95}, zbl = {0666.05024}, mrnumber = {937552}, language = {en}, url = {http://dml.mathdoc.fr/item/106600} }
Loebl, Martin. Hercules and Hydra. Commentationes Mathematicae Universitatis Carolinae, Tome 029 (1988) pp. 85-95. http://gdmltest.u-ga.fr/item/106600/
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