Biscaro, Guilherme Augusto, et al. “GERMINATION AND DEVELOPMENT OF AMERICAN LETTUCE SEEDLINGS (Lactuca Sativa L.) IRRIGATED WITH HOME AND INDUSTRIAL EFFLUENT-RECEIVING WATER”. IRRIGA, vol. 9, no. 3, Dec. 2004, pp. 207-16, doi:10.15809/irriga.2004v9n3p207-216.