%0 Journal Article %A Cacciari, Leo %T On the automorphism group of a toroidal hypermap %J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications %D 1992 %P 523-540 %V 26 %N 6 %I EDP-Sciences %U http://www.numdam.org/item/ITA_1992__26_6_523_0/ %G en %F ITA_1992__26_6_523_0