Comparison of NIR and ATR-IR spectroscopy for the determination of the antioxidant capacity of Primulae flos cum calycibus - Schönbichler, S A; Falser, G FJ; Hussain, S; Bittner, L K; Abel, G; Popp, M; Bonn, G K; Huck, C W (Anal Methods, 2014)