NAWROCKI, A. On some applications of convolution to linear differential equations with Levitan almost periodic coefficients. Topological Methods in Nonlinear Analysis, [S. l.], v. 50, n. 2, p. 489–512, 2017. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2017.015. Acesso em: 3 lip. 2024.