On the existence of Harmonic Morphisms form Symmetric spaces of rank one. Sigmundur Gudmundsson — 1997 Manuscripta mathematica
Non-Holomorphic Harmonic morhpisms form Kähler manifolds. Sigmundur Gudmundsson — 1994 Manuscripta mathematica
p-harmonic maps and minimal submanifolds. Paul Baird; Sigmundur Gudmundsson — 1992 Mathematische Annalen