Tystad Lund, Kjetil http://orcid.org/0000-0002-1792-1135
Tangen, Geir Arne http://orcid.org/0000-0003-0032-8500
Manstad-Hulaas, Frode http://orcid.org/0000-0002-4899-0248
Funding for this research was provided by:
Norges Teknisk-Naturvitenskapelige Universitet