Sampaio, R. A., Fontes, P. C. R. and Sediyama, C. S. (1999) “Tomato response to potassium fertirrigation and black polyethylene cover”, Pesquisa Agropecuaria Brasileira, 34(1), pp. 21–30. doi: 10.1590/S1678-3921.pab1999.v34.5141.