,. In memoriam of Igor Karlovich Daugavet (1932-2022). Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy, [S. l.], v. 10, n. 1, p. 180–181, 2023. Disponível em: https://math-mech-astr-journal.spbu.ru/article/view/15506. Acesso em: 20 may. 2024.