Não informado. (2003). Polish Journal of Natural Sciences. University of Warmia and Mazury in Olsztyn.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Polish Journal of Natural Sciences. Olsztyn, Polonia: University of Warmia and Mazury in Olsztyn, 2003.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Polish Journal of Natural Sciences. University of Warmia and Mazury in Olsztyn, 2003.
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