Sakiewicz, P. i in. 2019. Methane fermentation of poultry manure — shortcomings and advantages of the technology: fermentation or co-fermentation?. Eco-Energetics: technologies, environment, law and economy. 2, (cze. 2019), 97–104. DOI:https://doi.org/10.24426/eco-energetics.v2i2.114.