E_6 multiplets and unification in extra dimensions
E_6 unification model building III. Clebsch-Gordan coefficients in E_6 tensor products of the 27 with higher dimensional representations
E_6 Unification with Bi-Large Neutrino Mixing
E_6 Unification, Doublet-Triplet Splitting and Anomalous U(1)_A Symmetry