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Łukasz Kaczmarek, B. Gołdyn, M. Czyż, and Łukasz Michalczyk, “First records of Isohypsibius pushkini Tumanov, 2003 (Tardigrada, Eutardigrada, Hypsibiidae) from Poland”, BIOLET, vol. 47, no. 2, pp. 81–85, Jun. 2011.