Ranzi, A., Freni Sterrantino, A., Forastiere, F., Sartini, C., Casale, G., Cavallini, R., De Togni, A., Gallo, L. and Lauriola, P. (2015) “Asthmatic symptoms and air pollution: a panel study on children living in the Italian Po Valley”, Geospatial Health, 10(2). doi: 10.4081/gh.2015.366.