Authors: RUSSO, G. REGGIANI, A. Nijkamp, P.

Citation: G. RUSSO et al., Modelling and estimating modal share in European transport: a comparative analysis using interregional freight flow data, Rivista internazionale di economia dei trasporti, 30(1), 2003, pp. 25-43

Authors: Munda, G. Nijkamp, P. Rietveld, P.

Citation: G. Munda et al., Comparison of fuzzy sets: a new semantic distance, Ricerca operativa, (65), 1993, pp. 5

Authors: Nijkamp, P. Rouwendal, J.

Citation: P. Nijkamp et J. Rouwendal, The Social Rate of Discount in project evaluation, Ricerca operativa, (47), 1988, pp. 33