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| 1991 | ||
|---|---|---|
| 2 | EE | Zhi-Cheng Gao: The number of rooted triangular maps on a surface. J. Comb. Theory, Ser. B 52(2): 236-249 (1991) |
| 1 | EE | Zhi-Cheng Gao: The number of rooted 2-connected triangular maps on the projective plane. J. Comb. Theory, Ser. B 53(1): 130-142 (1991) |