Sprawka, Arkadiusz, Lucyna Pietrzak, Dariusz Garmol, Dobromira Tyc-Szczepaniak, Lucyna Kepka, and Krzysztof Bujko. 2013. “Definitive Radical External Beam Radiotherapy for Rectal Cancer: Evaluation of Local Effectiveness and Risk of Late Small Bowel Damage”. Acta Oncologica 52 (4):816-23. https://doi.org/10.3109/0284186X.2012.707786.