%0 Journal Article %A Breda d'Azevedo, Antonio %A Rodrigues, Ilda InĂ¡cio %A Fernandes, Maria Elisa %T On chirality groups and regular coverings of regular oriented hypermaps %J Czechoslovak Mathematical Journal %D 2011 %P 1037-1047 %V 61 %N 4 %I mathdoc %U https://geodesic-test.mathdoc.fr/articles/10.1007/s10587-011-0046-6/ %R 10.1007/s10587-011-0046-6 %G en %F 10_1007_s10587_011_0046_6