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Friedli, B; Jaag, C; Krähenbühl, D; Nielsen, O B; Pihl, S M; Trinkner, U (2006). Consumer preferences and last mile pricing in the postal sector. In: Crew, M A; Kleindorfer, P R. Liberalization of the postal and delivery sector. Cheltenham, UK: Edward Elgar Publishing, 343-356.