Holtkamp, M. (2018). The Wider Impacts of Transport Infrastructure Investments: Agglomeration and Imperfect Competition in General Equilibrium. Doctoral thesis, Department of Economics, Kiel University, Kiel.
Gibson, G., Varma, A., Cox, V., Korzhenevych, A., Dehnen, N., Bröcker, J., Holtkamp, M. & Meier, H. (2014). Update of the handbook on external costs of transport. Final report for the European Commission – DG Mobility and Transport, London, UK.