I. R. da Silva, A. E. F. Neto, L. A. Fernandes, N. Curi, and F. R. do Vale, “Forms, quantity/intensity ratio and bioavailability of potassium in different Latosols (Oxisols)”, PAB, vol. 35, no. 10, pp. 2065–2073, Oct. 2000, doi: 10.1590/S1678-3921.pab2000.v35.6001.