Ferraz, R. L. de S.; Beltrão, N. E. de M.; Melo, A. S. de; Magalhães, I. D.; Fernandes, P. D.; Rocha, M. do S. Gas Exchange and Photochemical Efficiency of Cotton Cultivars under Leaf Application of Silicon. Semina: Ciênc. Agrár. 2014, 35, 735-748.