P. M. Guarda, L. O. do Amaral, L. da S. Gualberto, and E. A. Guarda, “OVERVIEW OF THE USE OF AGROCHEMICALS IN PINEAPPLE CULTURE IN THE STATE OF TOCANTINS AND POSSIBLE CONTAMINATION PROBLEMS”, DRIUFT, vol. 3, no. Especial, pp. 70–79, Feb. 2017.