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Number of items: 10.

Trebels, Walter and Westphal, Ursula (2005):
K-functionals related to semigroups of operators.
In: Rendiconti del circolo matematico di Palermo : Series 2, (Suppl.), pp. 603-620. Springer, ISSN 0009-725X, e-ISSN 1973-4409,
[Article]

Gogatishvili, Amiran and Opic, Bohumir and Trebels, Walter (2005):
Limiting reiteration for real interpolation with slowly varying functions.
In: Mathematische Nachrichten, 278, pp. 86-107. [Article]

Trebels, Walter and Belinsky, E. (2004):
Generalized Liouville differentiation, truncated hypersingular integrals and K-functionals.
In: Mathematische Zeitschrift, 246, pp. 339-357. [Article]

Trebels, Walter and Westphal, U. (2003):
Characterizations of K-functionals built from fractional powers of infinitesimal generators of semigroups.
In: Constructive Approximation, 19, pp. 355-371. [Article]

Trebels, Walter and Westphal, U. (2003):
K-functionals on L1(Rn) related to the Laplacian.
In: Contemporary Mathematics, 320, pp. 459-465. [Article]

Opic, Bohumir and Trebels, Walter (2003):
Sharp embeddings of Bessel potential spaces with logarithmic smoothness.
In: Proceedings of the Cambridge Philosophical Society, 134, pp. 347-384, [Conference or Workshop Item]

Kryakin, Yuri and Trebels, Walter (2002):
q-Moduli of continuity in H P(D), p > 0, and an inequality of Hardy and Littlewood.
115, In: Journal of approximation theory, pp. 238-259. [Article]

Trebels, Walter and Stokolos, A. M. (1999):
Equivalence of a K-functional with the approximation behaviour of some linear means for abstract Fourier series.
In: Proceedings of the American Mathematical Society, 127, pp. 2883-2887, [Conference or Workshop Item]

Stokolos, A. M. and Trebels, Walter (1999):
On the rate of almost everywhere convergence of certain integral means. Part I: Periodical case.
In: Journal of approximation theory. 98 (1999), S. 203-222, [Article]

Kamaly, A. and Stokolos, A. M. and Trebels, Walter (1999):
On the rate of almost everywhere convergence of certain integral means. Part II.
In: Journal of approximation theory. 101 (1999), S. 240-262, [Article]

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