Szulc, Piotr Mirosław, et al. “Evaluation of the Use of Spring Rapeseed in Phytoremediation of Soils Contaminated With Trace Elements and Their Effect on Yield Parameters”. Plant Breeding and Seed Science, vol. 69, June 2014, pp. 81-95, http://ojs.ihar.edu.pl/index.php/pbss/article/view/288.