1. “Norske jernbanestasjoner i mur 1854–1913: en studie i en av 1800–tallets nye bygningstyper,” master's thesis, University of Bergen, 1986,1954
2. “Hvorledes det norske beboelseshus av træ får et nationalt præg,”;Norsk Teknisk Tidsskrift,1884
3. From 1814 to 1905, Norway was in a union with Sweden, governed by the Swedish king, yet with an independent Norwegian parliament adhering to the Norwegian constitution of 1814