Solution of boundary value problems for the heat  equation with a piecewise constant coefficient using the Fourier method. Kazakh Mathematical Journal, [S. l.], v. 22, n. 2, p. 16–27, 2024. DOI: 10.70474/drms4076. Disponível em: https://mathjournal.kz/index.php/kmj/article/view/10. Acesso em: 31 jan. 2025.