1. L. V. Gladun and A. N. Plichko, ?Norming and strongly norming subspaces of a conjugate Banach space,? Ukr. Mat. Zh.,36, No. 4, 427?433 (1984).
2. F. S. Vakher and A. N. Plichko, ?The bounded approximation property and linear finitedimensional regularizability,? Ukr. Mat. Zh.,33, No. 2, 167?171 (1981).
3. F. S. Vakher, ?The bounded approximation property in separable Banach spaces,? Dokl. Akad. Nauk SSSR,255, No. 6, 1301?1306 (1980).
4. V. A. Vinkurov, E. N. Domanskii, L. D. Menikhes, and A. N. Plichko, ?Certain problems of linear regularizability,? Dokl. Akad. Nauk SSSR,270, No. 1, 31?34 (1983).
5. I. Singer, Bases in Banach Spaces. I, Springer-Verlag, Berlin-Heidelberg-New York (1970).