Drozdowska, Lucyna, et al. “Glucosinolate Content and Pathogenic Fungi Occurrence in Seeds of Spring Oilseed Rape Fertilised With Sulphur”. Plant Breeding and Seed Science, vol. 46, no. 2, Dec. 2002, pp. 3-9, https://ojs.ihar.edu.pl/index.php/pbss/article/view/770.