Vakulenko, D. V., et al. “THE USE OF ARTERIAL OSCILLOGRAPHY TO ASSESS THE QUALITY OF ADAPTATION OF THE CARDIOVASCULAR SYSTEM TO CHANGES IN BODY POSITION (ORTHOSTATIC TEST)”. Medical Informatics and Engineering, no. 4, Mar. 2017, pp. 43-48, doi:10.11603/mie.1996-1960.2016.4.7060.