DRAGOMIR, Sever S. ON PEČARIĆ’S INEQUALITY IN INNER PRODUCT SPACES. Matematichki Bilten, [S. l.], v. 27, n. 1, p. 19–30, 2003. Disponível em: https://bilten.smm.org.mk/index.php/bilten/article/view/1681. Acesso em: 14 aug. 2026.