HELEŠIC, Jan. The effects of iron and manganese mine watres on stream biota (Case study of ecological risk assessment). In SECOTOX 2002. Book of Astracts, 7th Regional Meeting of the Central and Eastern European Section. 1,. Brno, Czech Republic: Masarykova Univerzita v Brně, 2002, p. 106. ISBN 80-210-2971-4.