1. Case report: A 17-year-old male with primary pulmonary osteosarcoma
   Xin Wen et al, 2024, Frontiers in Medicine CrossRef
2. Biphasic (dedifferentiated) osteosarcoma of the lung in the light of current ideas on biphasic tumors
   N. V. Vasilyev et al, 2020, Arkhiv patologii CrossRef