Disconjugacy (Lecture Notes in Mathematics, 220)
Almost Periodic Differential Equations (Lecture Notes in Mathematics, 377)
Recurrences and Discrete Dynamic Systems (Lecture Notes in Mathematics, 809)
Bessel Polynomials (Lecture Notes in Mathematics, 698)
Absolute Summability of Fourier Series and Orthogonal Series (Lecture Notes in Mathematics, 1067)
Regular Boundary Value Problems Associated with Pairs of Ordinary Differential Expressions (Lecture Notes in Mathematics, 858)
Integration Theory (Lecture Notes in Mathematics, 1078)
Asymptotic Analysis for Integrable Connections with Irregular Singular Points (Lecture Notes in Mathematics, 1075)
Lectures on Summability (Lecture Notes in Mathematics, 107)
Differentiation of Integrals in Rn (Lecture Notes in Mathematics, 481)
