@article{MASLO_1997_47_2_a1,
     author = {Breda d'Azevedo, Antonio J.},
     title = {The reflexible hypermaps of characteristic $-2$},
     journal = {Mathematica slovaca},
     pages = {131--153},
     year = {1997},
     volume = {47},
     number = {2},
     mrnumber = {1476863},
     zbl = {1053.05504},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1997_47_2_a1/}
}