Choudhury, R., N. Jahan, N. Sultana, R. Akter, and A. A. Khanum. “Parasympathetic Nerve Function Status During Different Phases Of Menstrual Cycle In Healthy Young Women”. Journal of Bangladesh Society of Physiologist, vol. 6, no. 2, Feb. 2012, pp. 100-7, doi:10.3329/jbsp.v6i2.9759.