Sigmundsson, F., Crustal Deformation Studies in Sub-aerial Parts of the World Oceanic Rift System: Iceland and Afar, Ph. D. thesis, University of Colorado, Boulder, 112 pp., 1992.

Sigmundsson, F., Viscosity of the Earth beneath Iceland, comparison of model calculations with geological data (in Icelandic with English abstract), M.S. thesis, University of Iceland, 121 pp., University Press, University of Iceland, Reykjavik, 1990.