1. Kernels of finite oscillation and convolution integrals;Bleimann;Acta. Math. Acad. Sci. Hungar.,1980
2. Linear combinations of Bernstein polynomials;Butzer;Canad. J. Math.,1953
3. The Banach-Steinhaus theorem with rates, and applications to various branches of analysis;Butzer,1980
4. On Jackson-type inequalities in approximation theory;Butzer,1978
5. Fourier Analysis and Approximation, I;Butzer,1971