@article {7293,
	title = {Problematic issues of cladistics: 1. Ancestor recognition and phylogenetic classification},
	journal = {Neues Jahrbuch f{\"u}r Geologie und Pal{\"a}ontologie Abhandlungen},
	volume = {230},
	number = {1},
	year = {2003},
	month = {October},
	pages = {97-143},
	keywords = {cladistics, classification, paleontology, phylogenetics, taxonomy},
	author = {Reif, Wolf-Ernst}
}
@article {7294,
	title = {Problematic issues of cladistics: 3. Homology and apomorphy; ontology versus operationalism},
	journal = {Neues Jahrbuch f{\"u}r Geologie und Pal{\"a}ontologie Abhandlungen},
	volume = {231},
	number = {3},
	year = {2004},
	month = {March},
	pages = {395-422},
	keywords = {cladistics, classification, paleontology, phylogenetics, taxonomy},
	author = {Reif, Wolf-Ernst}
}
