Pabi, S., Y. Yanthan, S. Gupta, B. Das, A. Ibrahim, N. Kassim, S. Varshney, D. Singh, and M. Gupta. “Second Primary Chondrosarcoma of the Maxilla: A Case Report”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 6, no. 9, Aug. 2020, pp. 1733-6, doi:10.18203/issn.2454-5929.ijohns20203584.