LAWTON, W. THE FEICHTINGER CONJECTURE FOR EXPONENTIALS. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO), [S. l.], v. 2, n. 1, p. 131–140, 2011. Disponível em: https://ph03.tci-thaijo.org/index.php/jnao/article/view/2622. Acesso em: 2 sep. 2026.