The correct formulation of the physical problem and the poorly conditioned matrix. Mathematical Machines and Systems, [S. l.], n. 3, p. 101–110, 2019. DOI: 10.34121/1028-9763-2019-3-101-110. Disponível em: https://www.j-mms.de/index.php/mms/article/view/2019-3-a9. Acesso em: 11 aug. 2026.