Alongi, P., Laudicella, R., Desideri, I., Chiaravalloti, A., Borghetti, P., Quartuccio, N., Fiore, M., Evangelista, L., Marino, L., Caobelli, F., Tuscano, C., Mapelli, P., Lancellotta, V., Annunziata, S., Ricci, M., Ciurlia, E., & Fiorentino, A. (2019). positron emission tomography with computed tomography imaging (PET/CT) for the radiotherapy planning definition of the biological target volume: PART 1. Critical reviews in oncology/hematology, 140, 74–79. http://access.bl.uk/ark:/81055/vdc_100086839377.0x000013