Płaza, A., B. Gąsiorowska, and E. Rzążewska. “Post-Harvest Residues of Narrow-Leafed lupin/Oat Mixtures As a Source of Biological Nitrogen for Hybrid Winter Rye”. Italian Journal of Agronomy, vol. 15, no. 2, May 2020, pp. 88-93, doi:10.4081/ija.2020.1503.