Sahijwani L, Sukavanam N. Approximate controllability for systems of fractional nonlinear differential equations involving Riemann-Liouville derivatives. Int. J. Optim. Control, Theor. Appl. (IJOCTA) [Internet]. 2023 Jan. 26 [cited 2025 Jan. 5];13(1):59-67. Available from: http://ijocta.org/index.php/files/article/view/1178