Hu and coworkers remember some literature. For example, , decompose the O-H stretching spectral region "into four isotropic components and three anisotropic components applying Fourier deconvolution. Some other researchers decomposed the contour into four components" . , fitted the band with five Gaussian components, which have been assigned to molecules with are fully or partly hydrogen bonded. are also stressing that Qiang , "classified the local hydrogen bonding of water molecule as DDAA (double donor-double acceptor), DDA (double donor-single acceptor), DAA (single donor-double acceptor) and DA (single donorsingle acceptor) and free OH, which correspond to five deconvoluted Gaussian sub-bands of O-H stretching vibrational band of water" . , "held that it was unnecessary to fit the spectrum and they directly analyzed the raw spectra without any deconvolution. In practice, the method applied in treating the spectra can be an art depending on the hypothesis on the identification of possible species or conformations in water" . Very interesting this sentence regarding the Raman band decomposition.