References
Pettinato G, Manivel JC, Saldana MJ, Peyser J, Dehner LP. Primary bronchopulmonary fibrosarcoma of childhood and adolescence: reassessment of a low-grade malignancy. Clinicopathologic study of five cases and review of the literature. Hum Pathol. 1989 May;20(5):463-71. PMID: #2651281#