Först, C. J., M. Lundell, and L.-E. Holm. “Tumors After Radiotherapy for Skin Hemangioma in Childhood: A Case-Control Study”. Acta Oncologica 29, no. 5 (January 1, 1990): 557–562. Accessed May 21, 2026. https://medicaljournalssweden.se/actaoncologica/article/view/32616.