Alternative forms with orders of the lax equivalence theorem in Banach spaces. - P. L. Butzer; W. Dickmeis; Hu. Jansen; R. J. Nessel (Computing, 1977)

A Sampling Theorem for Duration-Limited Functions with Error Estimates - P. L. Butzer; Wolfgang Splettstösser (Inf. Control., 1977)

Sampling principle for duration-limited signals and dyadic Walsh analysis. - P. L. Butzer; Wolfgang Splettstösser (Inf. Sci., 1978)

Dyadic Calculus and Sampling Theorems for Functions with Multidimensional Domain. I: General Theory - P. L. Butzer; Wolfgang Engels (Inf. Control., 1982)

Dyadic Calculus and Sampling Theorems for Functions with Multidimensional Domain. II: Applications to Dyadic Sampling Representations - P. L. Butzer; Wolfgang Engels (Inf. Control., 1982)

On the implementation of the Shannon sampling series for band-limited signals. - P. L. Butzer; Wolfgang Engels (IEEE Trans. Inf. Theory, 1983)

Nonuniform Sampling Expansions of Two-Dimensional Bandlimited Signals. - P. L. Butzer; Guido Hinsen (ASST, 1987)

Sampling Theory for not Necessarily Band-Limited Functions: A Historical Overview. - Paul L. Butzer; Rudolf L. Stens (SIAM Rev., 1992)

Classical and approximate sampling theorems; studies in the lP(R) and the uniform norm. - Paul L. Butzer; J. R. Higgins; Rudolf L. Stens (J. Approx. Theory, 2005)

A linear ODE for the Omega function associated with the Euler function Ealpha(z) and the Bernoulli function Balpha(z). - Paul L. Butzer; Tibor K. Pogány; H. M. Srivastava 001 (Appl. Math. Lett., 2006)

Otto Blumenthal (1876-1944) in retrospect. - Paul L. Butzer; Lutz Volkmann (J. Approx. Theory, 2006)

A retrospective on 60 years of approximation theory and associated fields. - Paul L. Butzer (J. Approx. Theory, 2009)

Herbert Raabe's work in multiplex signal transmission and his development of sampling methods. - Paul L. Butzer; M. M. Dodson; Paulo Jorge S. G. Ferreira; J. R. Higgins; O. Lange; P. Seidler (Signal Process., 2010)

Prediction by samples from the past with error estimates covering discontinuous signals. - Carlo Bardaro; Paul L. Butzer; Rudolf L. Stens; Gianluca Vinti (IEEE Trans. Inf. Theory, 2010)

Shannon's Sampling Theorem for Bandlimited Signals and Their Hilbert Transform, Boas-Type Formulae for Higher Order Derivatives - The Aliasing Error Involved by Their Extensions from Bandlimited to Non-Bandlimited Signals. - Paul L. Butzer; Gerhard Schmeisser; Rudolf L. Stens (Entropy, 2012)

The classical and approximate sampling theorems and their equivalence for entire functions of exponential type. - Paul L. Butzer; Gerhard Schmeisser; Rudolf L. Stens (J. Approx. Theory, 2014)

On the Paley-Wiener theorem in the Mellin transform setting. - Carlo Bardaro; Paul L. Butzer; Ilaria Mantellini; Gerhard Schmeisser (J. Approx. Theory, 2016)

Sobolev spaces of fractional order, Lipschitz spaces, readapted modulation spaces and their interrelations; applications. - Paul L. Butzer; Gerhard Schmeisser; Rudolf L. Stens (J. Approx. Theory, 2016)

A retrospective on research visits of Paul Butzer's Aachen research group to North America and Western Europe. - Paul L. Butzer; Rudolf L. Stens (J. Approx. Theory, 2020)

Boundary value problems of potential theory for the exterior ball and the approximation and ergodic behaviour of the solutions. - P. L. Butzer; Rudolf L. Stens (J. Approx. Theory, 2023)

The Butzer-Kozakiewicz article on Riemann derivatives of 1954 and its influence. - P. L. Butzer; Rudolf L. Stens (Adv. Comput. Math., 2023)