Sumarta, Ni Putu, D, Coen, Hendrianto, Eryk, Susilowati, Helen, Karsari, Deya, AND Rantam, Fedik. " Chondrogenic Differentiation Capacity of Human Umbilical Cord Mesenchymal Stem Cells with Platelet Rich Fibrin Scaffold in Cartilage Regeneration (In Vitro Study)" BALI MEDICAL JOURNAL [Online], Volume 5 Number 3 (26 September 2016)