Condeço-Melhorado, A., J. Gutiérrez Puebla, and J. C. García Palomares. “Influence of Distance Decay on the Measurement of Spillover Effects of Transport Infrastructure: A Sensitivity Analysis”. GeoFocus. International Review of Geographical Information Science and Technology, no. 13_1, June 2013, pp. 22-47, https://www.geofocus.org/index.php/geofocus/article/view/260.