K. E. Cortés-Tello and P. F. Jaramillo-López, “Fermented soil amendments made from stabilized biosolids and fly ash improve maize (Zea mays L.) nutrition and growth”, Int. J. Recycl. Org. Waste Agric., vol. 9, no. 1, Mar. 2020, doi: 10.30486/ijrowa.2020.671671.