Yohji Akama, Nico Van Cleemput. Spherical tilings by congruent quadrangles: Forbidden cases and substructures. Ars Math. Contemp., 8(2):297-318, 2015. [doi]
@article{AkamaC15,
title = {Spherical tilings by congruent quadrangles: Forbidden cases and substructures},
author = {Yohji Akama and Nico Van Cleemput},
year = {2015},
url = {https://amc-journal.eu/index.php/amc/article/view/581},
researchr = {https://researchr.org/publication/AkamaC15},
cites = {0},
citedby = {0},
journal = {Ars Math. Contemp.},
volume = {8},
number = {2},
pages = {297-318},
}