TY - JOUR AU - Shude Long AU - Han Ren TI - Counting 2-connected 4-regular maps on the projective plane JO - The electronic journal of combinatorics PY - 2014 VL - 21 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.37236/4038/ DO - 10.37236/4038 ID - 10_37236_4038 ER -