Ferdousi, Sultana, Mehboba Ferdous, and Md. Saiful Islam. 2014. “Impact of Smoking Status on Autonomic Functions Assessed by Spectral Analysis of Heart Rate Variability”. International Journal of Clinical and Experimental Physiology 1 (1), 57-62. https://ijcep.org/index.php/ijcep/article/view/48.