Hajjej, Z., and M. Balegh. “Uniform Boundary Controllability of a Discrete 1-D Schrodinger Equation”. Carpathian Mathematical Publications 7, no. 2 (December 24, 2015): 259–270. Accessed November 21, 2024. https://ktipe.pnu.edu.ua/index.php/cmp/article/view/1406.