BABENKO, V. F.; LEVCHENKO, D. A. Uniformly distributed ridge approximation of some classes of harmonic functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 64, n. 10, p. 1426–1431, 2012. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2669. Acesso em: 5 dec. 2025.