Oliveira, F.A. de, Campos, T.G. da S. and Oliveira, B.C. (1999) “Effect of soil-water tension on herbaceous cotton yield”, Pesquisa Agropecuaria Brasileira, 34(10), pp. 1905–1911. doi:10.1590/S1678-3921.pab1999.v34.5523.