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Biologia. Section Botany. Section Zoology. Section Cellular and molecular biology . Vol. 56 , No. 1-6 , 2001 . Bratislava : Slovak Academic Press Ltd. . ISSN 0006-3088 . [2, of that borrowed 0]

Svet živočíšnej ríše : ilustrovaná encyklopédia . Martin :  Osveta , 1990 . 606 s . ISBN 80-217-0192-7 . [2, of that borrowed 0]