Mažeikienė, A., Valentukevičienė, M., Rimeika, M., Matuzevičius, A.B. and Dauknys, R. 2008. Removal of nitrates and ammonium ions from water using natural sorbent zeolite (clinoptilolite). Journal of Environmental Engineering and Landscape Management. 16, 1 (Mar. 2008), 38-44. DOI:https://doi.org/10.3846/1648-6897.2008.16.38-44.