T.K. Tan and  P.S. Khiew and  W.S. Chiu and  S.Radiman and  R.Abd-Shukor and  N.M. Huang and  H.N. Lim,  Photodegradation of Phenol Red in the Presence of ZnO Nanoparticles.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2011, vol. 55(7). 627 - 632
    [viewed 17 January 2022]. Available from: https://publications.waset.org/pdf/10272.