Stöck, M., C. Dufresnes, S. N. Litvinchuk, P. Lymberakis, S. Biollay, M. Berroneau, A. Borzée, K. Ghali, M. Ogielska, and N. Perrin. 2012. Cryptic diversity among Western Palearctic tree frogs: Postglacial range expansion, range limits, and secondary contacts of three European tree frog lineages (Hyla arborea group). Molecular Phylogenetics and Evolution 65: 1–9.