Resummation of large logarithms in the heavy-quark effects on the parton distributions inside the virtual photonYoshio Kitadono, Ryo Sahara, Tsuneo Uematsu and Takahiro UedaEur. Phys. J. C, 70 4 (2010) 999-1007DOI: https://doi.org/10.1140/epjc/s10052-010-1494-0