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[N] Nikoľskij S. M.: Approximation of functions of several variables and embedding theorems. Second edition. (Russian). Moscow: Nauka 1977 [English translation of the first edition: Berlin-Heidelberg-New York: Springer-Verlag 1975]. MR 0374877

[ST] Schmeisser H.-J., Triebel H.: Topics in Fourier analysis nad function spaces. Leipzig: Akad. Verlagsgesellschaft Geest & Portig 1987 and Chichester: Wiley 1987.

[TO] Triebel H.: Interpolation Theory, Function spaces, Differential Operators. North-Holland Publ. Comp., Amsterdam-New York-Oxford: 1978. MR 0503903 | Zbl 0387.46033

[T1] Triebel H.: Anisotropic function spaces I, II. Anal. Math. 10 (1984), 53-77, 79-96. DOI 10.1007/BF02115872

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[U2] Uspenskij S. V.: On traces of functions of the Sobolev class $W\sb{p}\sp{1\sb{1}\ldots 1\sb{n}}$ on smooth surfaces. (Russian). Sibirsk. Math. Ž. 13 (1972), 429-451. MR 0312252

[UDP] Uspenskij S. V., Demidenko G. V., Perepelkin V. G.: Embedding theorems and applications to differential equations. (Russian). Novosibirsk: Nauka, 1984.