@article{ITA_1992__26_6_523_0, author = {Cacciari, Leo}, title = {On the automorphism group of a toroidal hypermap}, journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications}, pages = {523--540}, publisher = {EDP-Sciences}, volume = {26}, number = {6}, year = {1992}, mrnumber = {1195743}, zbl = {0768.30029}, language = {en}, url = {http://www.numdam.org/item/ITA_1992__26_6_523_0/} }