Alvarez-Lopez, V., M. Lado-Liñares, A. Rigueiro-Rodríguez, and M. R. Mosquera-Losada. “Sewage Sludge Affects Pasture Productivity and Nitrogen Use Efficiency in a Grassland Field Experiment”. Spanish Journal of Agricultural Research, Vol. 23, no. 4, Feb. 2026, p. 21400, doi:10.5424/sjar/2025234-21400.