Juzeniene A, Setlow R, Porojnicu A, Steindal AH, Moan J (August 2009). "Development of different human skin colors: a review highlighting photobiological and photobiophysical aspects". J. Photochem. Photobiol. B, Biol. 96 (2): 93–100. doi:10.1016/j.jphotobiol.2009.04.009. PMID19481954.
Juzeniene A, Setlow R, Porojnicu A, Steindal AH, Moan J (August 2009). "Development of different human skin colors: a review highlighting photobiological and photobiophysical aspects". J. Photochem. Photobiol. B, Biol. 96 (2): 93–100. doi:10.1016/j.jphotobiol.2009.04.009. PMID19481954.