?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Griban%2C+G.+P.&rft.aulast=Griban&rft.aufirst=G.+P.&rft.issue=74(3)&rft.date=2021&rft.atitle=Dynamics+of+students'+fitness+level+while+differentiating+physical+education+classes+in+accordance+with+their+health+and+nosology+of+diseases&rft.title=Wiadomo%C5%9Bci+Lekarskie&rft.pages=641-646&rft.genre=article