Absolute Summability of Fourier Series and Orthogonal Series (Lecture Notes in Mathematics, 1067)
Pointwise Convergence of Fourier Series
Lectures on Summability (Lecture Notes in Mathematics, 107)
Multipliers for (C,alpha)-Bounded Fourier Expansions in Banach Spaces and Approximation Theory (Lecture Notes in Mathematics, 329)
Discontinuous Cebysev Systems (Lecture Notes in Mathematics, 707)
Calderon-Zygmund Operators, Pseudo-Differential Operators and the Cauchy Integral of Calderon (Lecture Notes in Mathematics, 994)
Vorlesungen über Orthogonalreihen
Differentiation of Integrals in Rn (Lecture Notes in Mathematics, 481)
Analytically Uniform Spaces and Their Applications to Convolution Equations (Lecture Notes in Mathematics, 256)
Spherical Harmonics (Lecture Notes in Mathematics, 17)