HAVEL, Josef, David FETSCH, Eladia María PEŇA MÉNDEZ,
Přemysl LUBAL and
Jan HAVLIŠ. Recent developments in humic acid characterisation by CE and MALDI-TOF mass spectrometry. In
Understanding and Managing Organic Matter in Soils, Sediments and Waters. Atlanta: IHSS, 2001, p. 77-82.