KOWALCZYK, Piotr; MROZOWSKI, Michał. Mesh-free approach to Helmholtz equation based on radial basis functions. Journal of Telecommunications and Information Technology, Warsaw, Poland, v. 20, n. 2, p. 71–74, 2005. DOI: 10.26636/jtit.2005.2.302. Disponível em: https://www.jtit.pl/jtit/article/view/302. Acesso em: 13 jun. 2026.