Almeida, E. P. de; Freire, A. L. de O.; Bakke, I. A.; Ferreira, C. D. Gas Exchange and Water Use Efficiency in Seedlings of Tree Species from Caatinga under Water Levels and Potassium. Rev. Principia 2021, 1 (53), 218-230. https://doi.org/10.18265/1517-0306a2020v1n53p218-230.