Molecular phylogeny of the western Palaearctic Helicoidea (Gastropoda, Stylommatophora) - Razkin, O., Gómez-Moliner, B. J., Prieto, C. E., Martínez-Ortí, A., Arrébola, J. R., Muñoz, B., Chueca, L. J. & Madeira, M. J. (Molecular Phylogenetics and Evolution, 2015)