Comparing the biocidal properties of non-thermal plasma sources by reference protocol Josef Khun, Jana Jirešová, Lucie Kujalová, Pavel Hozák and Vladimír Scholtz Eur. Phys. J. D, 71 10 (2017) 263 Published online: 19 October 2017 DOI: 10.1140/epjd/e2017-80115-9