(eds.), Handbusch der Reptilien und Amphibien Europas, band 4/I Schwanzlurche (Urodela) I (Hynobiidae, Proteidae, Plethodontidae, Salamandridae I: Pleurodeles, Salamandrina, Euproctus, Chioglossa, Mertensiella).
2009: Sexual dimorphism in the Italian endemic species Salamandrina perspicillata (Savi, 1821) and testing of a field method for sexing salamanders.