Huanyun, D. , Rui, X. , Jianchang, L. , Yage, Y. , Qiuxia, W. , Hadi, N. (2013). 'Biogas Yield Potential Research of Tithonia diversifolia in Mesophilic Anaerobic Fermentation in China'. World Academy of Science, Engineering and Technology, Open Science Index 79, International Journal of Environmental and Ecological Engineering, 7(7), 522 - 525.