S. J. Mitchual and  K. Frimpong-Mensah and  N. A. Darkwa,  Evaluation of Fuel Properties of Six Tropical Hardwood Timber Species for Briquettes.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2014, vol. 91(7). 531 - 537
    [viewed 19 March 2024]. Available from: https://publications.waset.org/pdf/10002350.