Joshi, Amit, Nirab Kayasth, Ritesh Sinha, and Bharat Prasad Singh. 2015. “Ahlback’s Disease: Spontaneous Osteonecrosis of the Knee”. Medical Journal of Shree Birendra Hospital 13 (2):47-51. https://nepjol.info/index.php/MJSBH/article/view/13117.