Can the SO(10) Model with Two Higgs Doublets Reproduce the Observed   Fermion Masses?
  It is usually considered that the SO(10) model with one 10 and one 126 Higgs scalars cannot reproduce the observed quark and charged lepton masses. Against this conventional conjecture, we find solutions of the parameters which can give the observed fermion mass spectra. The SO(10) model with one 10 and one 120 Higgs scalars is also discussed. 
K.Matsuda, Y.Koide, T.Fukuyama