M. J. Gregório, P. Graça, A. Costa, and P. J. Nogueira, “Time and regional perspectives of food insecurity during the economic crisis in Portugal, 2011-2013”, Saúde Soc., vol. 23, no. 4, pp. 1127–1141, Dec. 2014, doi: 10.1590/S0104-12902014000400001.