Kellokumpu-Lehtinen, P., K.-O. Söderström, A. Kortekangas, and E. Nordman. 1989. “Radiation-Induced Morphological Changes and Radiocurability in Squamous Cell Carcinoma of the Head and Neck Region: A Preliminary Report”. Acta Oncologica 29 (4):517-20. https://doi.org/10.3109/02841869009090042.