Choong, Peter F M, Douglas J Pritchard, Michael G Rock, Franklin H Sim, and Frank J Frassica. 1995. “Survival After Pulmonary Metastasectomy in Soft Tissue Sarcoma: Prognostic Factors in 214 Patients”. Acta Orthopaedica 66 (6):561-68. https://doi.org/10.3109/17453679509002316.