OKADA , A., M. HATORI, M. HOSAKA, M. WATANUKI, and E. ITOI. “Secondary Osteosarcoma Arising After Treatment for Childhood Hematologic Malignancies”. Upsala Journal of Medical Sciences, vol. 114, no. 4, Dec. 2009, pp. 249–255, doi:10.3109/03009730903177340.