Published Determination of beryllium in various types of natural waters by electrothermal atomic absorption spectrometry by Hagarová I., Macháčková ., L. Žemberyová M. and Návojová V. 40-47_814_Hagarova_14-1.pdf
Published Removal of ammonia by clinoptilolite by Zabochnicka-Swiatek M. and Malinska K. 256-261_724_Zabochnicka_12-3.pdf