J. Srinivasa, M. Ramesh Bha, and M. Prabha Adhikari, “RESPIRATORY SINUS ARRHYTHMIA (RSA): NONINVASIVE MEASURE OF PARASYMPATHETIC CARDIAC CONTROL IN NEWLY DIAGNOSED HYPERTENSIVES AND THE INFLUENCE OF ABDOMINAL BREATHING”, J. V. N. Karazin Khark. Nat. Univ., Ser. Med., no. 3, pp. 80-85, 1.