Aufderheide, Karl J.; Daggett, Pierre-Marc; Nerad, Thomas A. (1983). "Paramecium sonneborni n. sp., a New Member of the Paramecium aurelia Species-Complex". The Journal of Eukaryotic Microbiology. 30 (1): 128–131. doi:10.1111/j.1550-7408.1983.tb01046.x. ISSN1066-5234.
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Aufderheide, Karl J.; Daggett, Pierre-Marc; Nerad, Thomas A. (1983). "Paramecium sonneborni n. sp., a New Member of the Paramecium aurelia Species-Complex". The Journal of Eukaryotic Microbiology. 30 (1): 128–131. doi:10.1111/j.1550-7408.1983.tb01046.x. ISSN1066-5234.