TY - JOUR AU - David Nesbitt AU - R. Naaman BT - The Journal of Chemical Physics DA - 1989-08 DO - 10.1063/1.456865 PY - 1989 EP - 3801 T2 - The Journal of Chemical Physics TI - On the apparent spectroscopic rigidity of floppy molecular systems VL - 91 SN - 00219606 ER -