1. Functional Tests in Cardiology;Aronov,2003
2. Load ECG Tests: 10 Steps to Practice;Aksel’rod,2011
3. Functional Diagnostics of the States of the Autonomous Nervous System;Zemtsovskii,2004
4. Heat rate variability: a review;Acharya;Medical & Biological Engineering & Computing,2006
5. Analysis of the heart rate variability with various cardiological systems (methodical recommendations);Baevskii;Vestnik Arimologii,2001