1. [1] L. Babinkostova, B. A. Pansera, and M. Scheepers, Weak covering properties and selection principles, Topol. Appl., 160 (2013), 2251–2271.
2. [2] M. K. Bose and R. Tiwari, On increasing sequences of topologies on a set, Riv. Mat. Univ. Parma., 7 (2007), 173–183.
3. [3] M. K. Bose and R. Tiwari, On topological spaces, Riv. Mat. Univ. Parma., 9 (2008), 125–132.
4. [4] M. K. Bose and A. Mukharjee, On countable families of topologies on a set, Novi Sad J. Math., 40 (2010), 7–16.
5. [5] M. K. Bose and R. Tiwari, topological connectedness and hyperconnectedness, Note Mat., 31 (2011), 93–101.