Gomes Filho, Valdez Juval Rocha, et al. “Investigation of Salmonella Spp. In Backyard Chickens (Gallus Gallus Domesticus) and Eggs Sold in Free Markets in the City of Fortaleza, Ceará”. Semina: Ciências Agrárias, vol. 35, no. 4, Aug. 2014, pp. 1855-64, doi:10.5433/1679-0359.2014v35n4p1855.