Durig, James R.; Zheng, Chao; Marzluf, Kathleen R.; Marquez, Gerardo B.; Guirgis, Gamil A.; Wurrey, Charles J.; Kilway, Kathleen V. Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 2005 , vol. 61, # 7 p. 1357 - 1373