Counting unrooted unsensed maps on closed orientable surface ,
Enumerating branched orientable surface coverings over a nonorientable surface, Discrete Math, pp.42-55, 2005. ,
The Euclidean functions of a group, Quart. J. Math. Oxford, vol.7, pp.134-151, 1936. ,
Subgroups of finite index in free groups, Journal canadien de math??matiques, vol.1, issue.2, pp.187-190, 1949. ,
DOI : 10.4153/CJM-1949-017-2
A Note on Counting Connected Graph Covering Projections, SIAM Journal on Discrete Mathematics, vol.11, issue.2, pp.286-292, 1998. ,
DOI : 10.1137/S0895480195293873
Ueber Riemann'sche Fl???chen mit gegebenen Verzweigungspunkten, Mathematische Annalen, vol.39, issue.1, pp.1-61, 1891. ,
DOI : 10.1007/BF01199469
Ueber die Anzahl der Riemann'schen Fl???chen mit gegebenen Verzweigungspunkten, Mathematische Annalen, vol.55, issue.1, pp.53-66, 1902. ,
DOI : 10.1007/BF01448116
Enumeration of homomorphisms and surface-coverings, Quart, J. Math. Oxford, issue.2, pp.46-485, 1995. ,
Enumarating subgroups of finite index, Proceedings of Com 2 MaC Mini-Workshop on Hurwitz Theory and Ramifications, 2003. ,
Isomorphism classes of graph bundles, Canad, J. Math. XLII, pp.747-761, 1990. ,
Enumeration of connected graph coverings, Journal of Graph Theory, vol.23, issue.2, pp.105-109, 1996. ,
DOI : 10.1002/(SICI)1097-0118(199610)23:2<105::AID-JGT1>3.0.CO;2-X
Balanced coverings of a signed graph and some regular branched orientable surface coverings over a non-orientable surface, Discrete Math, pp.177-193, 2004. ,
On the number of orientable coverings over non-orientable manifold ,
On the enumeration of subgroups of a free group, Dokl. Akad. Nauk BSSR, vol.15, pp.6-9, 1971. ,
Reductive enumeration under mutually orthogonal group actions, Acta Applicandae Mathematicae, vol.52, issue.1/3, pp.91-120, 1998. ,
DOI : 10.1023/A:1005950823566
The number of non-equivalent unbranched n-fold coverings of the Klein bottle, preprint, pp.2-06, 2002. ,
On the number of disconnected coverings over manifold, preprint, pp.3-20, 2006. ,
Hurwitz problem on the number of nonequivalent coverings of a compact Riemann surface, Siberian Mathematical Journal, vol.15, issue.No. 1, pp.415-420, 1982. ,
DOI : 10.1007/BF00973499
On the number of subgroups in the fundamental group of a closed surface, Communications in Algebra, vol.23, issue.10, pp.2137-2148, 1988. ,
DOI : 10.1007/BF00969347
A new method for counting coverings over manifold with finitely generated fundamental group, Doklady Mathematics, vol.74, issue.1, pp.498-502, 2006. ,
DOI : 10.1134/S1064562406040089
Counting unrooted hypermaps on closed orientable surface, Proceedings of the 18th International Conference on Formal Power Series and Algebraic Combinatorics, pp.1-19, 2006. ,
Number of nonequivalent coverings over a nonorientable compact surface, Siberian Mathematical Journal, vol.15, issue.No. 1, pp.99-106, 1986. ,
DOI : 10.1007/BF00969347
Groups with sign structure and their antiautomorphisms, Discrete Math, pp.189-202, 1992. ,