REALIZING HIGHER LEVEL GAUGE SYMMETRIES IN STRING THEORY: NEW EMBEDDINGS FOR STRING GUTS
Nucl.Phys.B 479 (1996) 113-172
STRING UNIFICATION, HIGHER LEVEL GAUGE SYMMETRIES, AND EXOTIC HYPERCHARGE NORMALIZATIONS
Nucl.Phys.B 467 (1996) 44-99
String Unification, Higher-Level Gauge Symmetries, and Exotic Hypercharge Normalizations
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New symmetries of supersymmetric effective Lagrangians.
Phys Rev D Part Fields 52:2 (1995) 1190-1203
Baryon magnetic moments in a simultaneous expansion in 1/N and ms.
Phys Rev D Part Fields 51:5 (1995) 2332-2337