Integral Averaging Technique for Oscillation of Elliptic Equations of Second Order. Journal of Partial Differential Equations, [S. l.], v. 16, n. 3, p. 193–203, 2003. Disponível em: https://www.global-sci.com/index.php/jpde/article/view/14882. Acesso em: 5 dec. 2025.