Jakovljevic, Z. Dragana, S. Milan Stankovic, and D. Marina Topuzovic. 2013. “Seasonal Variability of Chelidonium Majus L. Secondary Metabolites Content and Antioxidant Activity”. EXCLI Journal 12 (March):260-68. https://www.excli.de/index.php/excli/article/view/1147.