Solution of Time-Varying Index-2 Linear Differential Algebraic Control Systems Via A Variational Formulation Technique. Iraqi Journal of Science, [S. l.], v. 62, n. 10, p. 3656–3671, 2021. DOI: 10.24996/ijs.2021.62.10.24. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/3998.. Acesso em: 4 may. 2024.