Jasrotia, Rajani, Pramita Dubey, Arvind Kanchan, and Nitin John. “Cluster Pattern Poincaré in Heart Rate Variability Due to Some Low Voltage QRS Complexes: A Rare Case”. International Journal of Clinical and Experimental Physiology 7, no. 3 (October 6, 2020): 122-124. Accessed March 29, 2024. https://ijcep.org/index.php/ijcep/article/view/556.