Exact enumeration of rooted 3-connected triangular maps on the projective plane.

Zhicheng Gao Jianyu Wang Exact enumeration of rooted 3-connected triangular maps on the projective plane. 149-159 2004 141 Discrete Applied Mathematics 1-3 http://dx.doi.org/10.1016/S0166-218X(03)00375-5 db/journals/dam/dam141.html#GaoW04