Quality and Functionality of Saffron: Quality Control, Species Assortment and Affinity of Extract and Isolated Saffron Compounds to NMDA and σ1 (Sigma-1) Receptors - Lechtenberg, Matthias; Schepmann, Dirk; Niehues, Michael; Hellenbrand, Nils; Wünsch, Bernhard; Hensel, Andreas (Planta Medica, 2008)