Manfred Szerencsits and  Christine Weinberger and  Maximilian Kuderna and  Franz Feichtinger and  Eva Erhart and  Stephan Maier,  Biogas from Cover Crops and Field Residues: Effects on Soil, Water, Climate and Ecological Footprint.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2015, vol. 100(4). 413 - 416
    [viewed 13 November 2019]. Available from: https://publications.waset.org/pdf/10005395.