Cirino, Cledson Gomes, and Hugo O. Carvalho Guerra. “Use of the Energy Soil Water Content Relationship for the Physical-Hydric Characterization of Soils”. Pesquisa Agropecuaria Brasileira, vol. 29, no. 12, Dec. 1994, pp. 1973-8, doi:10.1590/S1678-3921.pab1994.v29.4256.