Reference

Bettina Sonntag, Wilhelm Foissner (2004): Urotricha psenneri n. sp. and Amphileptus piger (Vuxanovici, 1962) n. comb., two planktonic ciliates (Protozoa, Ciliophora) from an oligotrophic lake in Austria – J. Euk. Microbiol. – 51: 670 - 677.