Blar i Brage HiM på forfatter "Vaagen, Hajnalka"
Possibility of applying the rental-sevice based business model in the medium and high-end fashion industry in Norway. A case study: Moods of Norway Le, Ngo My Ngan (Master thesis, 2017)
Socio-Economic Optimal Pricing of Railroad Infrastructure (SOPJI). Mathematical Model Formulation and Implementation Kaut, Michal; Werner, Adrian; Lium, Arnt-Gunnar; Flatberg, Truls; Vaagen, Hajnalka; Crainic, Teodor Gabriel (SINTEF Rapport, Research report, 2014)