Barlian, A., and N. L. W. E. Yanti. “Glycosaminoglycans Content and Type II Collagen Localization in Chondrogenic Differentiation of Adipose-Derived Mesenchymal Stem Cells Induced by L-Ascorbic Acid 2-Phosphate”. Journal of Mathematical and Fundamental Sciences, vol. 52, no. 1, Apr. 2020, pp. 98-111, doi:10.5614/j.math.fund.sci.2020.52.1.7.