Permatasari, Yuliati, Nasirun Zulqarnain, Hermina Sukmaningtyas, and Bantar Suntoko. “Correlations Between Osteoartritis Grading in Femorotibial Joint (kellgren Lawrence) With Cartilage Defects Grading”. Indonesian Journal of Rheumatology 8, no. 2 (February 9, 2018). Accessed April 18, 2024. https://journalrheumatology.or.id/index.php/ijr/article/view/57.