ANIKUSHYN, A. V.; NOMIROVS'KII, D. A. Generalized solutions for linear operators with weakened a priori inequalities. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 62, n. 8, p. 1011–1021, 2010. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2933. Acesso em: 27 apr. 2025.