K. Rattawan and  W. Intagun and  W. Kanoksilapatham,  Effect of Coffee Grounds on Physical and Heating Value Properties of Sugarcane Bagasse Pellets.   journal   = {International Journal of Chemical and Materials Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2019, vol. 151(7). 377 - 380
    [viewed 14 October 2019]. Available from: https://publications.waset.org/pdf/10010597.