Izewska J, Novotny J, Gwiazdowska B, Kindlova A, Kontra G, Van Dam J, et al. Quality Assurance Network in Central Europe: External audit on output calibration for photon beams. AO [Internet]. 1995 Jan. 1 [cited 2026 May 22];34(6):829-38. Available from: https://medicaljournalssweden.se/actaoncologica/article/view/31102