Prado, R. de M. and Fernandes, F.M. (2001) “Effect of slag and limestone on the availability of phosphorus of an Oxisol planted with sugarcane”, Pesquisa Agropecuaria Brasileira, 36(9), pp. 1199–1204. doi:10.1590/S1678-3921.pab2001.v36.6244.