^K.M. van Hee, B. Huitink and D.K. Leegwater (1986) Portplan : a decision support system for port terminals. Rotterdam : Econometric Institute. (One of the first reports for the Econometric Institute by Van Hee et al.
^Hevner, Alan R., et al. "Design science in information systems research." MIS quarterly 28.1 (2004): 75-105.
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