The method of secondary sources in electrical engineering science and ill-conditioned matrices. Mathematical Machines and Systems, [S. l.], n. 4, p. 82–94, 2020. DOI: 10.34121/1028-9763-2020-4-82-94. Disponível em: https://www.j-mms.de/index.php/mms/article/view/2020-4-a8. Acesso em: 11 aug. 2026.