Lisa H. Berens, Mimansa Cholera, Deborah Elam, Susan A. Fisher-Owens, Margaret Fisher, Stuart A. Gansky, Irene V. Hilton, Kara Lugtu, Robert Isman, Elaine Musselman, Howard Pollick, Ling Zhan. Review of Safety, Frequency and Intervals of Preventive Fluoride Varnish Application for Children. Journal of the California Dental Association. 2019 Nov 1; 47(11):713-718.