Metabolic Profiling of Lignan Variability in Linum species of Section Syllinum native to Bulgaria - Vasilev, Nikolay; Ebel, Rainer; Edrada, RuAngelie; Fuss, Elisabeth; Alfermann, A Wilhelm; Ionkova, Iliana; Petrova, Ana; Repplinger, Miriam; Schmidt, Thomas J (Planta Medica, 2008)