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2
A.-B. Strandskogen, R. Strandskogen and B. White, Practical Norwegian grammar, Oris, [Oslo, Norway], 1986.
3
Strandskogen, Åse-Berit and Strandskogen, Rolf, Norwegian: an essential grammar, Routledge, London, 1995.
4
K. Mac Donald and M. MacDonald, Exploring Norwegian grammar, Cappelen Damm, [Oslo], 2013.