Sivamani RK, Stoeber B, Liepmann D, Maibach HI PMID: 19016065

Chapter 2 Cosmeceuticals.

Lily Talakoub, Isaac M. Neuhaus, Siegrid S. Yu PMID:
Gartside MG, Chen H, Ibrahimi OA, Byron SA, Curtis AV, Wellens CL, Bengston A, Yudt LM, Eliseenkova AV, Ma J, Curtin JA, Hyder P, Harper UL, Riedesel E, Mann GJ, Trent JM, Bastian BC, Meltzer PS, Mohammadi M, Pollock PM PMID: 19147536