00663naa#a2200205#i#450# EN\\bibl\112399 20260119163937.1 2311-1402 20210625b2021####ek#y0engy0150####ca ENG RU Annual dynamics of dispersion mapping indicators of electrocardiogram tracing in students with different chronotypes Journal article Nizhnevartovsk Nizhnevartovsk State University 2021 4 с. Journal article local . 612.017.2 (612.17) ENG Pogonysheva Irina A Lunyak Inna I Pogonyshev Denis A vestnik.nvsu.ru