A Note on Existence of a Bound State for a Non-Autonomous Nonlinear Scalar Field Equation. Analysis in Theory and Applications, [S. l.], v. 35, n. 4, p. 355–376, 2020. DOI: 10.4208/ata.OA-0014. Disponível em: https://global-sci.com/index.php/ata/article/view/8175. Acesso em: 6 dec. 2025.