TY - JOUR AU - Chang, E AU - Shirley, Eric AU - Levine, Zachary C2 - Physical Review B (Condensed Matter and Materials Physics) DA - 2002-01-01 00:01:00 LA - en M1 - 65 PB - Physical Review B (Condensed Matter and Materials Physics) PY - 2002 TI - Excitonic Effects on Optical Second-Harmonic Polarizabilities of Semiconductors ER -