Arivazhagi, C., and N. Rajesh. “ON UPPER AND LOWER WEAKLY \(\mathcal{I}\)-CONTINUOUS MULTIFUNCTIONS”. Italian Journal of Pure and Applied Mathematics 36 (July 29, 2016): 899–912. Accessed August 16, 2026. https://journals.uniurb.it/index.php/ijpam/article/view/6472.