R. Thamizhvani, T, Josline Elsa Joseph, Bincy Babu, U Rithikka, D Rohini, and A Josephin Arockia Dhivya. “Comparison of Normal and Abnormal Conditions in ECG Using RR Variablity and Spectral Density”. International Journal of Engineering & Technology 7, no. 2.25 (May 3, 2018): 28–31. Accessed May 4, 2024. https://sciencepubco.com/index.php/ijet/article/view/12362.