STOROZH, O.G. On an approach to the construction of the Friedrichs and Neumann-Krein extensions of nonnegative linear relations: Array. Carpathian Mathematical Publications, [S. l.], v. 10, n. 2, p. 387–394, 2018. DOI: 10.15330/cmp.10.2.387-394. Disponível em: https://journals.pnu.edu.ua/index.php/cmp/article/view/1498. Acesso em: 29 mar. 2024.