| Semi-groups of operators and approximation PL Butzer, H Berens Springer Science & Business Media, 2013 | 1796 | 2013 |
| Fourier analysis and approximation, Vol. 1 PL Butzer, RJ Nessel Reviews in Group Representation Theory, Part A (Pure and Applied Mathematics …, 1971 | 1784 | 1971 |
| Wave operators and similarity for some non-selfadjoint operators H Heuser, RE Fullerton, CC Braunschweiger, ET Poulsen, J Leray, ... Contributions to functional analysis, 258-279, 1966 | 761 | 1966 |
| An introduction to fractional calculus PL Butzer, U Westphal Applications of fractional calculus in physics, 1-85, 2000 | 676 | 2000 |
| The sampling theorem and linear prediction in signal analysis PL Butzer Jahresbericht der Deutschen Mathematiker-Vereinigung 90, 1-70, 1988 | 467 | 1988 |
| Fractional calculus in the Mellin setting and Hadamard-type fractional integrals PL Butzer, AA Kilbas, JJ Trujillo Journal of Mathematical Analysis and Applications 269 (1), 1-27, 2002 | 321 | 2002 |
| Sampling theory for not necessarily band-limited functions: a historical overview PL Butzer, RL Stens SIAM review 34 (1), 40-53, 1992 | 317 | 1992 |
| A survey of the Whittaker-Shannon sampling theorem and some of its extensions PL Butzer Journal of Mathematical Research and Exposition 3 (1), 1983 | 295 | 1983 |
| Compositions of Hadamard-type fractional integration operators and the semigroup property PL Butzer, AA Kilbas, JJ Trujillo Journal of Mathematical Analysis and Applications 269 (2), 387-400, 2002 | 278 | 2002 |
| Mellin transform analysis and integration by parts for Hadamard-type fractional integrals PL Butzer, AA Kilbas, JJ Trujillo Journal of Mathematical Analysis and Applications 270 (1), 1-15, 2002 | 263 | 2002 |
| A Bernstein-type operator approximating continuous functions on the semi-axis G Bleimann, PL Butzer, L Hahn Indagationes Mathematicae (Proceedings) 83 (3), 255-262, 1980 | 249 | 1980 |
| A direct approach to the Mellin transform PL Butzer, S Jansche Journal of Fourier analysis and applications 3, 325-376, 1997 | 248 | 1997 |
| Limitierungsverfahren von Reihen mehrdimensionaler Kugelfunktionen und deren Saturationsverhalten H Berens, B PL, S Pawelke Publications of the Research Institute for Mathematical Sciences, Kyoto …, 1968 | 207 | 1968 |
| Kantorovich-type generalized sampling series in the setting of Orlicz spaces C Bardaro, G Vinti, PL Butzer, RL Stens Sampling Theory in Signal and Image Processing 6, 29-52, 2007 | 197 | 2007 |
| Walsh-Fourier series and the concept of a derivative PL Butzer, HJ Wagner Applicable Analysis 3 (1), 29-46, 1973 | 182 | 1973 |
| Linear combinations of Bernstein polynomials PL Butzer Canadian Journal of Mathematics 5, 559-567, 1953 | 160 | 1953 |
| Central factorial numbers; their main properties and some applications. PL Butzer, K Schmidt, EL Stark, L Vogt Numerical Functional Analysis and Optimization 10 (5-6), 419-488, 1989 | 151 | 1989 |
| Best trigonometric approximation, fractional order derivatives and Lipschitz classes PL Butzer, H Dyckhoff, E Görlich, RL Stens Canadian Journal of Mathematics 29 (4), 781-793, 1977 | 141 | 1977 |
| An introduction to sampling analysis PL Butzer Kluwer/Plenum, 2001 | 140 | 2001 |
| Approximation of continuous and discontinuous functions by generalized sampling series PL Butzer, S Ries, RL Stens Journal of approximation theory 50 (1), 25-39, 1987 | 138 | 1987 |
