1. Every nuclear Fréchet space with a regular basis has the quasi-equivalence property;Crone;Studia Math.,1974
2. A short proof of the theorem on quasi-equivalence of regular bases;Djakov;Studia Math.,1975
3. M.M. Dragilev A standard form of a basis in the space of analytic functions, Uspekhi Mat. Nauk 15 (2) (92) (1960) 181–188 (in Russian)
4. On regular bases in nuclear spaces;Dragilev;Amer. Math. Soc. Transl.,1970
5. M.M. Dragilev, Bases in Köthe spaces, Rostov University Press, Rostov, 1983, pp. 1–144 (in Russian)