M. E. Pratiwi, A. A. Barus, and C. H. Boli Tobi, “Collagen Deposition Effect of Superoxide Dismutase Corn Kernel Extract (Zea mays L.) as Skin Photoaging Treatment”, J. Food Pharm. Sci, vol. 13, no. 2, pp. 136-148, Jun. 2025.