Christiansen D. G.. Gamete types, sex determination and stable equilibria of all-hybrid populations of diploid and triploid edible frogs (Pelophylax esculentus) Rana esculenta as deduced from mtDNA analyses.. „BMC Evolutionary Biology”. 9 (135), 2009. DOI: 10.1186/1471-2148-9-135. PMID: 19527499.
Tunner H. G., Heppich-Tunner S.. Genome exclusion and two strategies of chromosome duplication in oogenesis of a hybrid frog. Short Communications.. „Naturwissenschaften”. 78 (1), s. 32-34, 1991. DOI: 10.1007/BF01134041.
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Christiansen D. G.. Gamete types, sex determination and stable equilibria of all-hybrid populations of diploid and triploid edible frogs (Pelophylax esculentus) Rana esculenta as deduced from mtDNA analyses.. „BMC Evolutionary Biology”. 9 (135), 2009. DOI: 10.1186/1471-2148-9-135. PMID: 19527499.
