Transformation Groups and Measures with Separable Orbits. R. Larsen — 1969 Monatshefte für Mathematik
The Multipliers for Functions with Fourier Transforms in Lp. R. Larsen — 1971 Mathematica Scandinavica
A theorem concerning the multipliers for functions with Fourier transforms in L p Larsen, R. — 1988 Portugaliae mathematica