Application of benchtop and portable near-infrared spectrometers for predicting the optimum harvest time of Verbena officinalis - Pezzei, C K; Schönbichler, S A; Kirchler, C G; Schmelzer, J; Hussain, S; Huck-Pezzei, V A; Popp, M; Krolitzek, J; Bonn, G K; Huck, C W (Talanta, 2017)