Y. Pousada-Ferradás, S. Seoane-Labandeira, M. Blanco, and A. Núñez-Delgado, “The effect of aging on element plant availability and bacterial counts of mixtures of wood ash and sewage sludge”, Maderas-Cienc Tecnol, vol. 13, no. 3, pp. 307–318, Dec. 2014.