Barrios M, Reyero G. An Euler-Lagrange Equation only Depending on Derivatives of Caputo for Fractional Variational Problems with Classical Derivatives. Stat., optim. inf. comput. [Internet]. 2020May18 [cited 2024Nov.15];8(2):590-01. Available from: http://47.88.85.238/index.php/soic/article/view/865