- Feasibility and early results of interstitial intensity-modulated HDR/PDR brachytherapy (IMBT) with/without complementary external-beam radiotherapy and extended surgery in recurrent pelvic colorectal cancer. Tepel, J., Niehoff, P., Bokelmann, F., Faendrich, F., Kremer, B., Schmid, A., Kovács, G. Strahlentherapie und Onkologie : Organ der Deutschen Röntgengesellschaft ... [et al]. (2005)