APPLICATION OF A BIOMEDICAL HARDWARE-SOFTWARE COMPLEX FOR THE STUDY OF ULTRADIAN RHYTHMS BY HEART RATE VARIABILITY Article Bashkireva Anastasia, Chibisov Sergey, Bashkireva Tatyana, Prutzkow Alexander, Maksimov Dmitriy BIO Web of Conferences. International Organisation of Vine and Wine. 2023. P. 3009-3009