00598naa#a2200205#i#450# EN\INFRA-M\bibl\6420 20240814011109.3 2306-174X 20150925b2015####ek#y0engy0150####ca RUS RU Entropy approach in the estimation of parameters of cardio schoolboys at latitudinal Journal article Moscow INFRA-M Academic Publishing LLC. 2015 8 с. Journal article local Yastrebov A. Gorbunov D. Elman Kseniya Gimadiev B. naukaru.ru