YANG, G.-S.; LEU, J.-W. EFFECTIVE ESTIMATES FOR BOUNDARY VALUE PROBLEMS. Tamkang Journal of Mathematics, [S. l.], v. 25, n. 2, p. 167–177, 1994. DOI: 10.5556/j.tkjm.25.1994.4440. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4440. Acesso em: 26 apr. 2024.