Blume, L. , Blume, L. and Fromm, O. (1999) “Spending effects of universities on their regions: Notes on methodology based on the example of the Gesamthochschule Kassel”, Raumforschung und Raumordnung | Spatial Research and Planning, 57(5-6), pp. 418–431. doi:10.1007/BF03184510.