BONDARENKO, V. G. Construction of a Fundamental Solution of a Perturbed Parabolic Equation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 55, n. 8, p. 1011–1021, 2003. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3977. Acesso em: 14 apr. 2025.