Drozdowska, Lucyna, Piotr Szulc, Aleksander Łukanowski, and Czesław Sadowski. 2002. “Glucosinolate Content and Pathogenic Fungi Occurrence in Seeds of Spring Oilseed Rape Fertilised With Sulphur”. Plant Breeding and Seed Science 46 (2):3-9. http://ojs.ihar.edu.pl/index.php/pbss/article/view/770.