Critical evaluation of spectral information of benchtop vs. portable near-infrared spectrometers: quantum chemistry and two- dimensional correlation spectroscopy for a better understanding of PLS regression models of the rosmarinic acid content in Rosmarin - Kirchler, C G; Pezzei, C K; Be, B; Mayr, S; Ishigaki, M; Ozaki, Y; Huck, C W (Analyst, 2017)