R. Thamizhvani T, Elsa Joseph J, Babu B, Rithikka U, Rohini D, Josephin Arockia Dhivya A. Comparison of Normal and Abnormal Conditions in ECG Using RR Variablity and Spectral Density. IJET [Internet]. 2018 May 3 [cited 2025 Aug. 17];7(2.25):28-31. Available from: https://mail.sciencepubco.com/index.php/IJET/article/view/12362