Beronius, P., Forberg, S., Henrikson, C. O., & Söremark, R. (1965). Iodine 125 as A Radiation Source with Special Emphasis on Its Applications in Medical Radiology: I. Theoretical considerations. Acta Oncologica, 3(1), 33–48. https://doi.org/10.3109/02841866509133078