1. A nuclear Fréchet space without basis; variation on a theme of Djakov and Mitiagin;Bessaga;Bull. Acad. Polon. Sci. Ser. Sci. Math. Astronom. Phys.,1976
2. Modified construction of nuclear Fréchet spaces without basis;Djakov;J. Functional Anal.,1976
3. Perfect Fréchet spaces;Dubinsky;Math., Ann.,1967
4. E. Dubinsky The structure of nuclear Fréchet spaces, Lecture Notes in Mathematics 720, Springer 1979.
5. Quotient spaces of (s) with basis;Dubinsky;Studia Math.,1978