Interpolation in Non-Quasi-Analytic Classes of Infinitely Differentiable Functions. Gösta Wahde — 1967 Mathematica Scandinavica
An Extremal Problem Related to Bernstein's Approximation Problem. Gösta Wahde — 1964 Mathematica Scandinavica
An Extremal Problem Related to the Theory of Quasi-Analytic Functions. Gösta Wahde — 1959 Mathematica Scandinavica
A Closure Problem for Spaces of Infinitely Differentiable Functions. Gösta Wahde — 1967 Mathematica Scandinavica