Qvortrup, Camilla, et al. “Addition of Sunitinib to Cetuximab and Irinotecan in Patients With Heavily Pre-Treated Advanced Colorectal Cancer”. Acta Oncologica, vol. 49, no. 6, Aug. 2010, pp. 833-6, doi:10.3109/0284186X.2010.482104.