A Priori Estimate and Fourier’s Method for Nonlocal Boundary Conditions of Mixed Problem for Singular Parabolic Equations in Sobolev Function Spaces. Global Journal of Science Frontier Research, [S. l.], v. 13, n. 18, p. 27–36, 2013. Disponível em: https://journalofscience.org/index.php/GJSFR/article/view/. Acesso em: 26 oct. 2026.