Candia Estrada , Victor, and Yolanda Santiago Ayala. “Existence of the Solution of a Schrödinger Type Homogeneous Model in Periodic Sobolev Spaces”. Selecciones Matemáticas 9, no. 02 (December 30, 2022): 357 - 369. Accessed April 23, 2024. https://revistas.unitru.edu.pe/index.php/SSMM/article/view/4912.