Hutagalung, Errol U., Didik Librianto, Saukani Gumay, Abdul Muthalib, and Bambang Budiatmoko. 2003. “Periosteal Osteosarcoma: A Case Report”. Medical Journal of Indonesia 12 (3):166-70. https://doi.org/10.13181/mji.v12i3.104.