NOOR, M. A. ON VARIATIONAL INEQUALITIES IN SEMI-INNER PRODUCT SPACES. Tamkang Journal of Mathematics, [S. l.], v. 24, n. 1, p. 91–99, 1993. DOI: 10.5556/j.tkjm.24.1993.4478. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4478. Acesso em: 21 nov. 2024.