KOPERNICKÁ, Miriama et al. Bioaccumulation of iron, zinc, copper and lead in honey bees, bee pollen and honeycomb. In Comparative European research. Comparative European research 2016 : Proceedings, research track of the 5th biannual CER Comparative European research conference. 1. vyd. - London : Sciemcee Publishing, 2016. ISBN 978-0-9928772-9-3, online, S. 123-126. Available on Internet: <http://www.sciemcee.org/library/proceedings/cer/cer2016_proceedings01.pdf.>