Detoni, A.A., Fonseca, L.B.R., Almeida, J.P.A. and Falbo, R.A. 2018. A Reference Ontology for Budgetary Authorization and Execution of Public Expenditure. iSys - Brazilian Journal of Information Systems. 11, 3 (Dec. 2018), 4–53. DOI:https://doi.org/10.5753/isys.2018.369.