@article{10_1007_s10587_011_0046_6,
     author = {Breda d'Azevedo, Antonio and Rodrigues, Ilda In\'acio and Fernandes, Maria Elisa},
     title = {On chirality groups and regular coverings of regular oriented hypermaps},
     journal = {Czechoslovak Mathematical Journal},
     pages = {1037--1047},
     publisher = {mathdoc},
     volume = {61},
     number = {4},
     year = {2011},
     doi = {10.1007/s10587-011-0046-6},
     mrnumber = {2886255},
     zbl = {1249.05086},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.1007/s10587-011-0046-6/}
}