Elstad, E., Guttersrud, Ø. & Turmo, A. (2011) Achievement tests in the Norwegian school system: Types and uses In: Madsen, L.C. (ed.) Achievement Tests: Types, Interpretations and Uses. Nova Science Publishers, Inc. 2011 ISBN 978-1-61122-056-8
Eyvind Elstad, Guri A. Nortvedt, Are Turmo, (2009) The Norwegian Assessment System: An Accountability Perspective, /Cadmo/, XVII, 1, 89-103.
Turmo,A., Guttersrud,Ø., Elstad, E. and Olsen, R.V. (2009): The impact of attending after-school care schemes on science achievement in primary school: A Norwegian Study. International Journal of Educational Research, 48, pp. 331-341
DOI information: 10.1016/j.ijer.2010.03.003