TY JOUR TI FEATURES OF HEART RATE VARIABILITY INDICATORS OF FEMALE STUDENTS LIVING IN AREAS WITH DIFFERENT ECOLOGICAL CONDITIONS KW heart rate variability KW cardiovascular system indicators KW students KW environmental pollution JO SCIENTIFIC NOTES KAZAN BAUMAN ACADEMY OF VETERINARY MEDICINE AU Skorozvon, M.S. AU Chernyavskikh, S.D. AU Palchikov, M.Y. AU Trikula, L.N. AU Vorobeva, O.V. PY 2026 IS 262 PB Kazan state agrarian University