@article{DMSMF_1989_1989_1_a1,
     author = {Jones, Gareth},
     title = {Enumerating regular maps and hypermaps.},
     journal = {Disertaciones del Seminario de Matem\'aticas Fundamentales},
     pages = {1-13},
     year = {1989},
     volume = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMSMF_1989_1989_1_a1/}
}