Vicentini, M.E. et al. 2015. Residual production of pineapple biomass under different levels of nitrogen and potassium in northwestern Paraná. Semina: Ciências Agrárias. 36, 6 (Dec. 2015), 3665–3670. DOI:https://doi.org/10.5433/1679-0359.2015v36n6p3665.