WASET
Georgiev, D. , Bogdanov, B. , Hristov, Y. , Markovska, I.. "The Removal of Cu (II) Ions from Aqueous Solutions on Synthetic Zeolite NaA". World Academy of Science, Engineering and Technology, Open Science Index 64, International Journal of Environmental and Ecological Engineering (2012), 6(4), 214 - 218.