Su In Park, Kwang Won Lee, Hoon Cha, and Moon Sam Shin. 2021. “Clinical Efficacy of Wrinkle Improvement Right After Using Antiaging Cosmetics Containing Palmitoyl-GHK-R4 Peptide”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12 (13):6058-62. https://doi.org/10.17762/turcomat.v12i13.9881.