Isbagio, Harry. “Comparison of Urinary Excretion of Deoxypiridinoline and Value of Serum Osteocalcin Within the Knee Osteoarthritis Grading”. Medical Journal of Indonesia 13, no. 2 (May 1, 2004): 96-101. Accessed March 1, 2024. https://mji.ui.ac.id/journal/index.php/mji/article/view/135.