Reference

P.H.H. Weekers, P.L.E. Bodelier, J.P.H. Wijen, G.D. Vogels (1993): Effects of grazing by the free-living soil amoebae Acanthamoeba castellanii, Acanthamoeba polyphaga and Hartmannella vermiformis on various bacteria – Appl. environm. Microbiol. – 59: 2317 - 2319.