Witorożec-Piechnik, Agata, Mariusz Matyka, Marek Woźniak, i Marta Oleszek. 2022. „The Effect of Fertilization With the Digestate on the Quality and Chemical Composition of Selected Plants Intended for Biogas Production”. Polish Journal of Agronomy 48 (48):28-36. https://doi.org/10.26114/pja.iung.478.2022.48.