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Charles J. O'Kelly; Jeffrey D. Silberman; Linda A. Amaral Zettler; Thomas A. Nerad; Mitchell L. Sogin (2003). "Monopylocystis visvesvarai n. gen., n. sp. and Sawyeria marylandensis n. gen., n. sp.: two new amitochondrial heterolobosean amoebae from anoxic environments". Protist. 154 (2): 281–290. doi:10.1078/143446103322166563. PMID13677454.