TY - RPRT TI - Local and nonlocal surface nonlinearities for surface optical second-harmonic generation. AU - P Guyot-Sionnest AU - YR Shen PY - 1987 DO - 10.1103/physrevb.35.4420 UR - https://pubmed.ncbi.nlm.nih.gov/9941996/ ID - 9941996 ER -