1. De Queiroz K (1998) The general lineage concept of species, species criteria, and the process of speciation: A conceptual unification and terminological recommendations. D. J. Howard and S. H. Berlocher (eds.). In Endless Forms: Species and Speciation, Oxford, England, Oxford University Press, 57–75 p.
2. Operational Criteria for Delimiting Species;JW Sites;Annu Rev Ecol Evol Syst,2004
3. Species delimitation in systematics: inferring diagnostic differences between species;JJ Wiens;Proc Biol Sci,2000
4. Species concepts and species delimitation;K De Queiroz;Syst Biol,2007
5. Gene flow and species delimitation;RJ Petit;Trends Ecol Evol,2009