Silva, V.F. da et al. 2014. Antimicrobial potential of ethanol extracts of plants against gramnegative bacilli isolated from cervicovaginal mucosa of sheep bred in the region of Petrolina-PE. Semina: Ciências Agrárias. 35, 2 (Apr. 2014), 883–890. DOI:https://doi.org/10.5433/1679-0359.2014v35n2p883.