Zubelzu Mínguez, S., López Díaz, A., Gutiérrez García, M. Ángel and Blanco Silva, F. 2011. Gravity methods as a tool to calculate greenhouse gas emissions from road traffic in urban planning. Revista Ingeniería de Construcción. 26, 2 (Aug. 2011), 187–207. DOI:https://doi.org/10.4067/S0718-50732011000200004.