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• | Pels, E. (2004), The economic regulation of airports, edited by P. Forsyth, D. Gillen, A. Knorr, O. Mayer, H-M. Niemeier and D. Starkie(Ashgate, Aldershot, 2004, ISBN 0754638162), Aerlines magazine, 28. |
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• | Pels, E. (2005), Competition versus predation in aviation markets: a survey of experience in North America, Europe and Asutralia , edited by P. Forsyth, D.W. Gillen, O.G. Mayer, H.-M. Niemeier (Ashgate, Aldershot, 2005, ISBN 0754641953), Journal of Network Industries, 335-336. |