Comparison of performance of land use regression models derived for Catalunya, Spain - de, Nazelle A; Aguilera, I; Nieuwenhuijsen, M; Beelen, R; Cirach, M; Hoek, G; de, Hoogh K; Sunyer, J; Targa, J; Brunekreef, B; Kuenzli, N; Basagana, X (ATMOSPHERIC ENVIRONMENT, 2013)