We review the status of a class of gauge unified models based on SO(10) group and discuss the main phenomenological implications of these models in particular for neutrino masses.
Neutrino Masses, Mixing Angles and the Unification of Couplings in the MSSM
Nucleon decay in gauge unified models with intersecting D6-branes
Comment on ``Neutrino masses and mixing angles in a predictive theory of fermion masses''
