“Distribution of Native and Exotic Branchiobdellidans (Annelida: Clitellata) on Their Respective Crayfish Hosts in Northern Italy, With the First Record of Native Branchiobdella Species on an Exotic North American Crayfish”. 1999. Journal of Limnology 58 (1): 20-24. https://doi.org/10.4081/jlimnol.1999.20.