NON-CLASSICAL OPTIMAL CONTROL PROBLEM: A CASE STUDY FOR CONTINUOUS APPROXIMATION OF FOUR-STEPWISE FUNCTION. Advances in Differential Equations and Control Processes, [S. l.], v. 30, n. 4, p. 309–321, 2023. DOI: 10.17654/0974324323017. Disponível em: https://pphmjopenaccess.com/adecp/article/view/1028. Acesso em: 5 jan. 2026.