Louati khatima, Mankouri Manel Ibtissem, Redjem Khaled. “Green Intellectual Capital As a Fundamental Pillar for Achieving Sustainable Environmental Performance”. European Economic Letters (EEL) 15, no. 2 (May 22, 2025): 2825–2845. Accessed March 13, 2026. https://eelet.org.uk/index.php/journal/article/view/3125.