TY - JOUR AU - Wannere, C S; Paul, A; Herges, R; Houk, K N; Schaefer, H F. III; von Ragué Schleyer, P JO - J. Comput. Chem. VL - 28 PY - 2007 DO - 10.1002/jcc.20532 SP - 344 ER -