PUKALSKYI, I. D. Green function of a parabolic boundary-value problem and the optimization problem. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 4, p. 567–571, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4448. Acesso em: 14 apr. 2025.