Subhashri, S., P. Pal, D. Papa, N. Nanda, G. K. Pal, and R. M. Packirisamy. “Assessment of Heart Rate Variability in Early Post-Menopausal Women”. International Journal of Clinical and Experimental Physiology, Vol. 6, no. 1, July 2019, pp. 11-14, doi:10.5330/ijcep.2019.6.1.4.