Giovanni, R., U. A. Wibowo, H. Judawisastra, and A. Barlian. “Growth of Human Dermal Fibroblasts on Polyvinyl Alcohol-Silk Fibroin Nanofiber Scaffold”. Journal of Mathematical and Fundamental Sciences, vol. 51, no. 3, Dec. 2019, pp. 294-08, doi:10.5614/j.math.fund.sci.2019.51.3.7.