Walsh, T. R. S. Hypermaps versus bipartite maps. (English) Zbl 0302.05101 J. Comb. Theory, Ser. B 18, 155-163 (1975). MSC: 05C10 05C15 PDF BibTeX XML Cite \textit{T. R. S. Walsh}, J. Comb. Theory, Ser. B 18, 155--163 (1975; Zbl 0302.05101) Full Text: DOI
Walsh, T. R. S.; Lehman, A. B. Counting rooted maps by genus. III: Nonseparable maps. (English) Zbl 0299.05110 J. Comb. Theory, Ser. B 18, 222-259 (1975). MSC: 05C30 05C10 PDF BibTeX XML Cite \textit{T. R. S. Walsh} and \textit{A. B. Lehman}, J. Comb. Theory, Ser. B 18, 222--259 (1975; Zbl 0299.05110) Full Text: DOI