Ruas, João Miguel Francisco, Rafael Balan, and Otávio Jorge Grigoli Abi Saab. 2011. “Coverage Comparison by Knapsack Sprayers Manual and Engine Powered”. Semina: Ciências Agrárias 32 (4):1417-22. https://doi.org/10.5433/1679-0359.2011v32n4p1417.