Afifah, E., Mozef, T., Sandra, F., Arumwardana, S., Rihibiha, D.D., Nufus, H., Rizal, R., Amalia, A., Bachtiar, I., Murti, H. and Widowati, W. 2019. Induction of Matrix Metalloproteinases in Chondrocytes by Interleukin IL-1β as an Osteoarthritis Model. Journal of Mathematical and Fundamental Sciences. 51, 2 (Aug. 2019), 103-111. DOI:https://doi.org/10.5614/j.math.fund.sci.2019.51.2.1.