TY - JOUR AU - E Chang AU - Zachary Levine AU - Eric Shirley 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 -