Z_2\times Z_2$ orbifold compactification as the origin of realistic free fermionic models

Z_3 Dark Matter and Two-Loop Neutrino Mass

Z_3 orbifolds of the SO(32) heterotic string: 1 Wilson line embeddings

Z_3 Polyakov Loop Models and Inverse Monte-Carlo Methods

Z_3 Strings and their Interactions

Z_3 Symmetry and Neutrino Mixing in Type II Seesaw

Z_k String fluxes and monopole confinement in non-Abelian theories

Z_N x Z_M orientifolds with and without discrete torsion

Z_n-Graded Topological Generalizations of Supersymmetry and Orthofermion Algebra

Z_N-Invariant Subgroups of Semi-Simple Lie Groups

Z_N-symmetry in gauge theories at finite temperatures

Z_n^3-graded colored supersymmetry

Z_p scalar dark matter from multi-Higgs-doublet models

Z_{12-I} Orbifold Compactification toward SUSY Standard Model

Zγγproduction with leptonic decays and triple photon production at NLO QCD

[SU(3)XSU(2)XU(1)]^2 and Strong Unification

[SU(5)]^3 SUSY unification

\$tring Theory and an Accelerating Universe

\bar u - \bar d asymmetry - a few remarks

\bf A Borel-Weil-Bott approach to representations of $\slq$