@article{PMB_2020____27_0,
     author = {Belabas, Karim and Bernardi, Dominique and Perrin-Riou, Bernadette},
     title = {Polygones fondamentaux d{\textquoteright}une courbe modulaire},
     journal = {Publications math\'ematiques de Besan\c{c}on. Alg\`ebre et th\'eorie des nombres},
     pages = {27--59},
     publisher = {Presses universitaires de Franche-Comt\'e},
     year = {2020},
     doi = {10.5802/pmb.40},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.5802/pmb.40/}
}