JOURNAL, B. S. Approximated Methods for Linear Delay Differential Equations Using Weighted Residual Methods: Abdul Khaliqe Ewaid Mizel. مجلة بغداد للعلوم, Iraq, Baghdad, v. 4, n. 4, p. 658-665, 2021. DOI: 10.21123/bsj.2007.4.4.658-665. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/851. Acesso em: 18 2021.