Electron impact ionisation cross sections of iron oxides Stefan E. Huber, Andreas Mauracher, Ivan Sukuba, Jan Urban, Thana Maihom and Michael Probst Eur. Phys. J. D, 71 12 (2017) 335 Published online: 19 December 2017 DOI: 10.1140/epjd/e2017-80308-2