On the ecology of the tapewarm Proteocephalus torulosus (Batsch, 1786) (Cestoda: proteophalidea) in chub (Leuciscus cephalus (L.)) from the River 1786) (Cestóda: Proteocephalidea) v tučniakoch (Leuciscus cephalus (L.)) z rieky Rokytné, Československo.)
by: Scholz, T.