Orzech, A. 2019. Monosubstrate agricultural micro-biogas plant for liquid manure as a complement to the technological line in large-scale animal husbandry — practical verification. Eco-Energetics: technologies, environment, law and economy. 2, (cze. 2019), 85–92. DOI:https://doi.org/10.24426/eco-energetics.v2i2.112.