by PRASAD, P. V. S, PAUL, Elizabeth K, GEORGE, Raj V, AMBUJAM, S, VISWANTHAN, P
Published in Indian journal of dermatology, venereology, and leprology (01.09.2002)

by Viswanthan, P S
Published in Journal of medical physics (1990)

by Ghilardi, G, Viswanthan, P N
Published in International journal of cosmetic science (01.08.1986)