Minato, E.A., Esper Neto, M., Sakurada, R.L., Inoue, T.T. e Batista, M.A. 2017. Foliar macronutrient contents and maize (Zea mays L.) production in response to gypsum application in an oxisol. Scientia Agraria Paranaensis. 16, 2 (jul. 2017), 219–224.