1. Bernstein S.N., Math. An., 1904, Bd.59.
2. Schauder J., Math. Z., Bd. 38, 1934.
3. Trenogin V.A., Functional Analysis (in Russian), Nauka, Moscow, 1980 and 1993 ( Nauka, Novosibirsk).
4. Donden A., Rev. Roum math. Pures et appl., v.25, No.10, p.14591475, 1980.
5. Gaponenko J.L., Journ. Vych. Math. i Math. Phys., v. 26, No. 8, p. 1123–1131, 1986.