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Zhang, Zejun; Zhu, Huawei; Zheng, Yating; Zhang, Lanyue; Wang, Xiaoling; Luo, Zhen; Tang, Jian; Lin, Li; Du, Zhiyun; Dong, Changzhi . (2020). The effects and mechanism of collagen peptide and elastin peptide on skin aging induced by D-galactose combined with ultraviolet radiation. Journal of Photochemistry and Photobiology B: Biology, 210(), 111964–. doi:10.1016/j.jphotobiol.2020.111964 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research