The Approximation of Solutions to Linear Homogeneous Differential Equations by Rational Functions. Charles Osgood — 1980 Monatshefte für Mathematik
On the simultaneous diophantine approximation of values of certain hypergeometric and algebraic functions Charles Osgood — 1974 Acta Arithmetica
On the simultaneous diophantine approximation of values of certain algebraic functions Charles Osgood — 1971 Acta Arithmetica
Product Type Bounds on the Approximation of Values of E and G Functions. Charles F. Osgood — 1986 Monatshefte für Mathematik
Nevanlinna Theory, Diophantine Approximation, and Numerical Analysis. Charles F. Osgood — 2001 The journal of Fourier analysis and applications [[Elektronische Ressource]]