Wu, M., Z. Xun, G. Wang, Y. Sun, and G. Chen. “Effects of Recombinant Human Collagen VI from <i>Escherichia coli</i> On UVA-Irradiated Human Skin Fibroblasts Cells”. African Journal of Biotechnology, vol. 10, no. 37, Oct. 2013, pp. 7271-8, doi:10.4314/ajb.v10i37.