S. Kudaibergenov, B. Selenova, G. A. Mun, N. Yesmurzayeva, and E. Nurgaziyeva, “Catalytic activity of poly(N-vinylpyrrolidone) protected gold nanoparticles deposited on ZnO”, IJBCh, vol. 7, no. 2, pp. 65–68, Dec. 2014.