1. Avise, J.C., 2004. Molecular Markers, Natural History and Evolution, 2nd ed. Sinauer Associates, Sunderland, MA.
2. Avise, J.C., Ball, R.M., 1990. Principles of genealogical concordance in species concepts and biological taxonomy. Oxf. Surv. Evol. Biol. 7, 45-67.
3. Bank, R.A., 2004. Fauna Europaea: Mollusca, Gastropoda. Fauna Europaea version 1.1, http://www.faunaeur.org.
4. Speciation in cave faunas;Barr;Annu. Rev. Ecol. Syst.,1985
5. Baum, D.A., Shaw, K.L., 1995. Genealogical perspectives on the species problem. In: Hoch, P.C., Stephenson, A.C. (Eds.), Experimental and Molecular Approaches to Plant Biosystematics. Missouri Botanical Garden, St. Louis, MO., pp. 289–303.