UNGURYAN, G. M. Nonlocal problem with impulse action for parabolic equations of vector order. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 73, n. 11, p. 1532 – 1540, 2021. DOI: 10.37863/umzh.v73i11.6521. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6521. Acesso em: 5 dec. 2025.