A. A. Balbinot Junior, A. N. L. Tôrres, J. A. da Fonseca, and J. R. Teixeira, “Growth and nutrient concentrations in the lettuce tissue by lime and paper residues application in an acid soil”, Rev. Ciênc. Agrovet., vol. 5, no. 1, pp. 9–15, Sep. 2006.