On Nonvanishing Univalent Functions with Real Coefficients. Wolfram Koepf — 1986 Mathematische Zeitschrift
Classical Families of Univalent Functions in the Hornich Space. Wolfram Koepf — 1985 Monatshefte für Mathematik
Software for the algorithmic work with orthogonal polynomials and special functions. Koepf, Wolfram — 1999 ETNA. Electronic Transactions on Numerical Analysis [electronic only]
Orthogonal polynomials and recurrence equations, operator equations and factorization. Koepf, Wolfram — 2007 ETNA. Electronic Transactions on Numerical Analysis [electronic only]