Reference

Helmut J. Schmidt, Hans Dieter Görtz (1987): Killer particles in the macronucleus of Paramecium caudatum – Annals of the New York Academy of Sciences. (Beinhaltet: Transactions of the New York Academa of Sciences 1898-1937). Frueher: Annals of the Lyceum of Natur.History of New York. – 503: 580 - 583.