@article{10_4064_aa_86_2_171_191,
     author = {Stefan Johansson},
     title = {Genera of arithmetic {Fuchsian} groups},
     journal = {Acta Arithmetica},
     pages = {171--191},
     publisher = {mathdoc},
     volume = {86},
     number = {2},
     year = {1998},
     doi = {10.4064/aa-86-2-171-191},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-86-2-171-191/}
}