R. Santhi, M. Rameshkumar. On pre-\(\mathcal{I}_s\)-open sets and pre-\( \mathcal{I}_s\)-continuous functions . Malaya J. Mat. [Internet]. 2014 Jul. 1 [cited 2024 Nov. 5];2(03):315-21. Available from: https://www.malayajournal.org/index.php/mjm/article/view/423