Abel G. J., Bastern S., Fuchs R., Garbero A., Goujon A., K.C. S., et al. (2014). Developing Expert-Based assumptions on future fertility, mortality and migration(M. Marsili & Capacci, G., Eds.). Retrieveddehttp://www.istat.it/it/files/2014/11/Atti_Unece_Eurostat.pdf