BEREZANSKY, Y. M. On self-conjugation of field operators and integral representations of Whiteman functionals . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 18, n. 3, p. 3–12, 1966. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8732. Acesso em: 11 apr. 2025.