Islam, T, N Begum, S Begum, S Ferdousi, and T Ali. “Evaluation of Parasympathetic Nerve Function Status in Healthy Elderly Subjects”. Journal of Bangladesh Society of Physiologist 3 (January 6, 2009): 23–28. Accessed July 8, 2024. https://banglajol.info/index.php/JBSP/article/view/1790.