M. S. L. Madhavi, A. Kulkarni, S. Mathur, and S. Punyani, “Influence of repeated cleansing on skin biophysical parameters: a randomized and double-blinded comparative study of a grade 1 toilet soap and a face cleanser”, Int J Res Dermatol, vol. 12, no. 6, pp. 605–610, Oct. 2026.