IVÁNYI, A. APPROXIMATE SOLUTION OF LAPLACE EQUATION IN UNBOUNDED REGIONS BY VARIATIONAL METHOD. Periodica Polytechnica Electrical Engineering, [S. l.], v. 31, n. 3-4, p. 73–84, 1987. Disponível em: https://pp.bme.hu/ee/article/view/4633. Acesso em: 22 jul. 2024.