WASET
    K. Pipitthapan and  S. Maksasithorn and  P. Praserthdam and  J. Panpranot and  K. Suriye and  S. Kunjara Na Ayudhya,  The Different Roles between Sodium and Potassium Ions in Ion Exchange of WO3/SiO2 Catalysts.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2015, vol. 101(5). 609 - 612
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/10001656.