Mármol, G. M. D., Geniez, P., Neumann, A., Glaw, F. and Fritz, U. (2025) “Phenotypic variability in the western grass snake Natrix astreptophora, with description of a new subspecies from Morocco”, Zootaxa. Auckland, New Zealand, 5693(1), pp. 41–65. doi: 10.11646/zootaxa.5693.1.3.