Fu JJ, Hillebrand GG, Raleigh P, Li J, Marmor MJ, Bertucci V, Grimes PE, Mandy SH, Perez MI, Weinkle SH, Kaczvinsky JR. A randomized, controlled comparative study of the wrinkle reduction benefits of a cosmetic niacinamide/peptide/retinyl propionate product regimen vs. a prescription 0· 02% tretinoin product regimen. British Journal of Dermatology. 2010 Mar 1;162(3):647-54.
McCook JP. Topical products for the aging face. Clinics in plastic surgery. 2016 Jul 1;43(3):597-604.
Bissett DL. Anti-aging skin care formulations. InCosmetic formulation of skin care products 2005 Jun 19 (pp. 191-210). CRC Press.