Species Problems and Beyond
John S. Wilkins, Frank E. Zachos & Igor Ya. Pavlinov
From Observations to Optimal Phylogenetic Trees
Pablo A. Goloboff
Refining Phylogenetic Analyses
Pablo A. Goloboff
What, if anything, are species?
Brent D. Mishler
Phylogenetic Systematics
Olivier Rieppel
What Species Mean
Julia D. Sigwart
Species
John S. Wilkins