Farnaz Amin Salehi and  David Edward.Cotton and  Mohammad Ali Abdoli and  Kambiz Rezapour,  The Necessity of Biomass Application for Developing Combined Heat and Power(CHP) with Biogas Fuel: Case Study.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2010, vol. 44(8). 346 - 351
    [viewed 06 March 2021]. Available from: https://publications.waset.org/pdf/1367.