%0 Journal Article %A Shude Long %A Han Ren %T Counting 2-connected 4-regular maps on the projective plane %J The electronic journal of combinatorics %D 2014 %V 21 %N 2 %U http://geodesic.mathdoc.fr/articles/10.37236/4038/ %R 10.37236/4038 %F 10_37236_4038