Limon-Ortega, A., and A. Baez-Perez. “Nitrogen Fertilizer Sources for Rainfed Wheat (Triticum Aestivum L.) Production Planted in Permanent Beds”. Spanish Journal of Agricultural Research, Vol. 23, no. 4, Feb. 2026, p. 21309, doi:10.5424/sjar/2025234-21309.