“Solution of Time-Varying Index-2 Linear Differential Algebraic Control Systems Via A Variational Formulation Technique”.
Iraqi Journal of Science 62, no. 10 (October 30, 2021): 3656–3671. Accessed July 31, 2025.
https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/3998.