1. On some double sequence spaces;Basarir;J Indian Acad Math,1999
2. An Introduction to the Theory of Infinite Series;Bromwich,1965
3. On the convergence of certain multiple series;Hardy;Proc Camb Phil Soc,1917
4. On fuzzy metric spaces;Kaleva;Fuzzy Sets and Systems,1984
5. Sequence Spaces and Series;Kamthan,1980