1. H. Apiola Every nuclear Fréchet space is a quotient of a Köthe Schwartz space, Archiv der Mathematik (to appear).
2. S. Bellenot E. Dubinsky in preparation.
3. A. Benndorf On the relations between some bounded approximation properties in nuclear Fréchet spaces, thesis, Universität Darmstadt (1981).
4. Nuclear Fréchet spaces without bases III;Bessaga;Archiv der Mathematik, 31,1978
5. Własności Baz w Przestrzeniach Typu B;Bessaga;Prace Mat.,1959