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LITTLEFORD, Robert A. Culture of Protozoa in the Classroom. The American Biology Teacher. 1960, roč. 22, čís. 9, s. 551–559. Dostupné online [cit. 2023-03-03]. ISSN0002-7685. DOI10.2307/4439448.
Ellen Lambrecht, Julie Baré, Natascha Chavatte, Wim Bert, Koen Sabbe, and Kurt Houf. Protozoan Cysts Act as a Survival Niche and Protective Shelter for Foodborne Pathogenic Bacteria. Applied and Environmental Microbiology [online]. 2015 [cit. 2023-03-03]. Dostupné online. DOI10.1128/AEM.01031-15.
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Biologie a přírodopis prakticky – nejen v době koronavirové – NPI – Národní pedagogický institut. www.npi.cz [online]. [cit. 2023-03-03]. Dostupné v archivu pořízeném z originálu dne 2022-07-03.
LITTLEFORD, Robert A. Culture of Protozoa in the Classroom. The American Biology Teacher. 1960, roč. 22, čís. 9, s. 551–559. Dostupné online [cit. 2023-03-03]. ISSN0002-7685. DOI10.2307/4439448.