WICHT, Barbara, et al. “Diphyllobothrium Latum (Cestoda: Diphyllobothriidea) in Perch (Perca Fluviatilis) in Three Sub-Alpine Lakes: Influence of Biotic and Abiotic Factors on Prevalence”. Journal of Limnology, vol. 68, no. 2, Aug. 2009, pp. 167-73, doi:10.4081/jlimnol.2009.167.