A. Brackmann, R. F. H. Giehl, S. T. de Freitas, A. C. Eisermann, and A. M. de Mello, “Use of polyethylene bags and ethylene absorption on refrigerated transport of ’Gala’ apple fruit”, Semina: Ciênc. Agrár., vol. 27, no. 3, pp. 423–428, Jun. 2006.