Contains the keyword 28

Plötner J, Uzzell T, Beerli P, Spolsky C, Ohst T, Litvinchuk SN, et al. Widespread unidirectional transfer of mitochondrial DNA: a case in western Palaearctic water frogs. Journal of Evolutionary Biology. 2008;21:668-81. Abstract
Che J, Pang J, Zhao E, Matsui M, Zhang Y. Phylogenetic relationships of the Chinese Brown Frogs (genus Rana) inferred from partial mitochondrial 12S and 16S rRNA gene sequences. Zoological Science. 2007;24:71-80.
Hillis DM. Constraints in naming parts of the Tree of Life. Molecular Phylogenetics and Evolution. 2007;42:331-8. Abstract
Dubois A. Naming taxa from cladograms: some confusions, misleading statements, and necessary clarifications. Cladistics. 2007;23:390-402. Abstract
Ohler A, Dubois A. Phylogenetic relationships and generic taxonomy of the tribe Paini (Amphibia, Anura, Ranidae, Dicroglossinae), with diagnoses of two new genera. Zoosystema. 2006;28:769-84. Abstract
Hillis DM, Wilcox TP. Phylogeny of the New World true frogs (Rana). Molecular Phylogenetics and Evolution. 2005;34:299-314. Abstract
Roelants K, Jiang JP, Bossuyt F. Endemic ranid (Amphibia: Anura) genera in southern mountain ranges of the Indian subcontinent represent ancient frog lineages: evidence from molecular data. Molecular Phylogenetics and Evolution. 2004;31:730-40. Abstract
Zaldívar-Riverón A, León-Regagnon V, Nieto-Montes de Oca A. Phylogeny of the Mexican coastal leopard frogs of the Rana berlandieri group based on mtDNA sequences. Molecular Phylogenetics and Evolution. 2004;30:38-49. Abstract