Positron transport in CF4 and N2/CF4 mixtures Ana Banković, Saša Dujko, Srdjan Marjanović, Ronald D. White and Zoran Lj. Petrović Eur. Phys. J. D, 68 5 (2014) 127 Published online: 20 May 2014 DOI: 10.1140/epjd/e2014-50087-5