E. Lunghi, S. Giachello, M. Mulargia, P. P. Dore, R. Cogoni, and C. Corti, “Variability in the dorsal pattern of the Sardinian grass snake (Natrix natrix cetti) with notes on its ecology”, Acta Herpetol., vol. 14, no. 2, pp. 141–145, Dec. 2019.