Dahal, S., A. Rajak, and A. Rajak. “Metastatic Osteogenic Sarcoma or Multifocal Osteosarcoma: A Case Report”. Journal of Kathmandu Medical College, vol. 10, no. 3, Dec. 2021, pp. 161-5, https://jkmc.com.np/ojs3/index.php/journal/article/view/1142.