Sadiqqa, A., A. Khan, S. Z. H. Sherazi, and S. Fatima. “Topological Techniques for Studying Solution Sets of Fractional Neutral Delay Differential Equations”. International Journal of Advancements in Mathematics, vol. 2, no. 1, June 2022, pp. 1-18, https://www.scienceimpactpub.com/journals/index.php/IJAM/article/view/553.