VÉLEZ, A. M. L. DE; CUNHA, G. A. P. DA. Influence of pH and urea on the efficacy of the 2-chloroethylphosphonic acid as floral inductant of pineapple. Pesquisa Agropecuaria Brasileira, v. 18, n. 11, p. 1199–1205, 16 Apr.2014.