Reference

N.K. Goosen, A.M.C. Horemans, S.J.W. Hillebrand, C.K. Stumm, G.D. Vogels (1988): Cultivation of the sapropelic ciliate Plagiopyla nasuta Stein and isolation of the endosymbiont Methanobacterium formicicum – Arch. Mikrobiol. – 150: 165 - 170.