Reference

T.M. Embley, B.J. Finlay, R.H. Thomas, P.L. Dyal (1992): The use of rRNA sequences and fluorescent probes to investigate the phylogenetic positions of the anaerobic ciliate Metopus palaeformis and its archaeobacterial endosymbiont – J. gen. Microbiol. – 138: 1479 - 1487.