↑ Kostka M, Hampl V, Cepicka I, Flegr J (October 2004). "Phylogenetic position of Protoopalina intestinalis based on SSU rRNA gene sequence". Mol. Phylogenet. Evol. 33 (1): 220–4. doi:10.1016/j.ympev.2004.05.009. PMID15324850.
↑ Patterson, D.J. (1985). "The fine structure of Opalina ranarum (Family Opalinidae): Opalinid phylogeny and classification". Protistologica. 21: 413–428.
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