Suwan I. Euler-Lagrange Equations with Generalized ABC and ABR Nabla Fractional Differences. JSH-AAUP [Internet]. 2026 Mar. 29 [cited 2026 Oct. 6];1(1):128-47. Available from: https://jsh-aaup.aaup.edu/index.php/jsh-aaup/article/view/9