Sundaraganesan N, Meganathan C, Anand B, Lapouge C. FT-IR, FT-Raman spectra and ab initio DFT vibrational analysis of p-bromophenoxyacetic acid. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 2007 Mar;66(3):773–80. doi: 10.1016/j.saa.2006.04.025.