DABBAGHİ A, MASSAH J, ALİZADEH M. Time scale, delta derivatives, nabla derivatives, self-adjoint boundary value problem, symetric Green’s function. ijnes [Internet]. 2019 May 31 [cited 2024 Nov. 14];4(3):07-11. Available from: https://ijnes.org/index.php/ijnes/article/view/12