VU KIM TUAN; YAKUBOVICH , S. B. One criterion of unitarity of bilateral integral transformation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 5, p. 697–699, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7967. Acesso em: 7 apr. 2025.