PRYČEK, Jiří, Miroslav CIGANEK a
Zdeněk ŠIMEK. Clean-up of Extracts for Nitrated Derivatives of Polycyclic Aromatic Hydrocarbons Analyses Prior to their Gas Chromatography Determination.
Journal of Brazilian Chemical Society. 2007, roč. 18, č. 6, s. 1125-1131. ISSN 0103-5053.