V. Chitra, V. Inthumathi, and K.Nirmaladevi. “Soft Pre Generalized Closed Sets With Respect to a Soft Ideal in Soft Topological Spaces”. International Journal of Mathematics And its Applications 4, no. 1 - C (February 29, 2016): 9–15. Accessed May 17, 2024. http://ijmaa.in/index.php/ijmaa/article/view/587.