1. Urea from the chemist's point of view;Raab RP;J Appl Cosmetol,1991
2. Urea: a clinically oriented overview from bench to bedside;Friedman AJ;J Drugs Dermatol,2016
3. Topical urea in skincare: A review
4. Urea: a comprehensive review of the clinical literature;Pan M;Dermatol Online J,2013
5. Urea as a bactericide, and its application in the treatment of wounds;Symmers W;Lancet,1915