Joelsson, Ingemak, and Anders Bäckström. “Dose Rate Measurements in Bladder and Rectum: Intracavitary Radiation of Carcinoma of the Uterine Cervix”. Acta Oncologica, vol. 8, no. 5, Jan. 1969, pp. 343-59, doi:10.3109/02841866909134464.