[1]Bondy J A, Murty U S R.Graph theory with application[M].New York,1976. [2]Yan W G,Yeh Y N.Enumeration of subtrees of trees[J].Theoretical Computer Science,2006,369256-268. [3]Zhao H X.Research on subgraph polynomials and reliability of networks[D].Xi′anNorthwestern Polytechnical University,P R China,2004. [4]Wang H.Some results on trees,PLd.Thesis, Department of Mathematics,University of South Carolina. [5]Eentringer R C,Jackson D E.Distance in raph[J].Czechoslovak Math J,1976,26283-296. [6]Fischermann M,Hoffmann A,Szekely L A,et al.Wiener index versus maximum degree in trees[J].Discrete Appl Math,2002,122单位 1-3)127-137. [7]Jelen F,Triesch E.Superdominance order and distance of trees with bounded maximum degree[J].Discrete Appl Math,2003,125单位 2/3)225-233. [8]Székely L A,Wang H.On subtrees of trees[J].Advances in Applied Mathematics, 2005,34单位 1)138-155. [9]Székely L A,Wang H.Binary trees with the largest number of subtrees[J].Discrete Applied Mathematics,2007,155单位 3)374-385. [9]李晓军.图的子树与网络可靠性[D].西宁青海师范大学,2010. |