Quantitation of crocins and picrocrocin in saffron by HPLC: application to quality control and phytochemical differentiation from other Crocus taxa - Koulakiotis, Nikolaos Stavros; Gikas, Evangelos; Iatrou, Gregoris; Lamari, Fotini N; Tsarbopoulos, Anthony (Planta medica, 2015)