OTRUBA, Vítězslav and Dagmar ADAMOVÁ. Selective Preconcentration of Thallium from Water and Aqueous Extracts of Wastes and Soils. In KRAKOVSKÁ, Erika. XIIIth Seminar on Atomic Spectrochemistry. 1. st. Podbanske in High Tatras, Slovensko: Slovenská spektroskopická spoločnosť, 1996, p. 302-306. ISBN 80-967325-7-9.