Jean Bevis, Michael Grady. Toroidal maps of modular quotient groups. Discrete Mathematics, 186(1-3):25-38, 1998. [doi]
@article{BevisG98,
title = {Toroidal maps of modular quotient groups},
author = {Jean Bevis and Michael Grady},
year = {1998},
doi = {10.1016/S0012-365X(97)00222-7},
url = {http://dx.doi.org/10.1016/S0012-365X(97)00222-7},
researchr = {https://researchr.org/publication/BevisG98},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {186},
number = {1-3},
pages = {25-38},
}