Wambersie, A., Dutreix, A., Prignot, M., & Dutreix, J. (1971). Calibration of an ionization chamber by comparison with FeSO4 for high energy electron beams. Studia Biophysica : international journal for selected fields of biophysics, 26(3), 167-177. https://hdl.handle.net/2078.5/108344 (Original work published 1971)