?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Horalskyi%2C+L.+P.&rft.aulast=Horalskyi&rft.aufirst=L.+P.&rft.issue=1&rft.volume=16&rft.date=2025&rft.issn=2519-8521&rft.atitle=The+features+of+the+morphology+of+the+heart+of+Clarias+gariepinus+(Siluriformes%2C+Clariidae)&rft.title=Regulatory+Mechanisms+in+Biosystems&rft.genre=article