1. Norwegian Agricultural History,2004
2. 'Strukturelle og institusjonelle endringsprosesser i den norske melkesektoren;Almås,2015
3. Milking robots in large dairy farms;Armstrong;Comput. Electron. Agric.,1997
4. Rundballeensilering. Ås: Statens Fagtjeneste for Landbruket;Bardalen,1993
5. The Social Construction of Technological Systems: New Directions in the Sociology and History of Technology;Bijker,2012