Orzech, Adam. 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 (czerwiec):85-92. https://doi.org/10.24426/eco-energetics.v2i2.112.