PAI, D. V. On Well-Posedness of Some Problems in Approximation. The Journal of the Indian Mathematical Society, [S. l.], v. 70, n. 1-4, p. 1–16, 2003. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/21884. Acesso em: 7 may. 2024.