Chikhlyaev, Igor, and Alexander Fayzulin. “Materials for the Helminth Fauna of the Edible Frog <em>Pelophylax esculentus</Em&gt; (Linnaeus, 1758) in the Volga Basin”. Biological Communications0, no. 3 (September 26, 2016): 175–180. Accessed October 22, 2020. https://biocomm.spbu.ru/article/view/62.