P. Fransson, P.-O. Löfroth, L. Franzén, R. Henriksson, P. Bergström, and A. Widmark, “Acute Side Effects after Dose-Escalation Treatment of Prostate Cancer Using the New Urethral Catheter BeamCath ® Technique”, AO, vol. 40, no. 6, pp. 756–765, Jan. 2001.