Computation of the Spitzer function in stellarators and tokamaks with finite collisionalityWinfried Kernbichler, Gernot Kapper, Sergei V. Kasilov and Nikolai B. MarushchenkoEPJ Web of Conferences, 87 (2015) 01006DOI: https://doi.org/10.1051/epjconf/20158701006