Leptoproduction of charm revisited
  We calculate the energy--momentum distribution of the charmed quarks produced in neutrino reactions on protons, quantifying the importance of mass and current non--conservation effects. We study the strange and charm distributions probed in neutrino interactions in the presently accessible kinematical region. Some ambiguities inherent to the extraction of the parton densities from dimuon data are pointed out. 
V.Barone, M.Genovese, N.N.Nikolaev, E.Predazzi and B.G.Zakharov