M.VINOTH, and B.JAYALAKSHMI. “BONE MINERAL DENSITY ESTIMATION USING DIGITAL X-RAY IMAGES FOR DETECTION OF RHEUMATOID ARTHRITIS”. International Journal of Pharma and Bio Sciences, vol. 5, no. 4, Sept. 2014, pp. 122-8, https://ijpbs.net/index.php/journal/article/view/3333.