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Dragomir, Sever S, Pecaric, Josip and Tepes, B (2004) Pre-Gruss Type Inequalitites in Inner Product Spaces. Nonlinear Functional Analysis and Applications, 9 (4). pp. 627-639. ISSN 1229-1595

Dragomir, Sever S, Pecaric, Josep and Tepes, B (2003) Pre-Grüss Type Inequalities in Inner Product Spaces. RGMIA research report collection, 6 (3).