Kristian, Alexandr, et al. “Positron Emission Tomography and Pharmacokinetics of 2-[18F]-Fluoroethyl Choline for Metabolic Studies in Breast Cancer Xenografts”. Acta Oncologica, vol. 53, no. 8, Aug. 2014, pp. 1086-92, doi:10.3109/0284186X.2014.934398.