Raj, Kuldip, and Sunil K. Sharma. “Some Generalized Difference Double Sequence Spaces Defined by a Sequence of Orlicz-Functions”. CUBO, A Mathematical Journal 14, no. 3 (October 1, 2012): 167–190. Accessed May 10, 2024. https://cubo.ufro.cl/ojs/index.php/cubo/article/view/1338.