G. Sarabha Reddy Gurram, and N. Rajesh. “Almost Contra-Continuity via Topological Grills”. Malaya Journal of Matematik 8, no. 01 (January 1, 2020): 189–194. Accessed July 16, 2024. https://www.malayajournal.org/index.php/mjm/article/view/1371.