Silveira, A., Canotilho, M., & Froufe, P. M. (2013). Citizenship and solidarity in the European Union: From the charter of fundamental rights to the crisis, the state of the art. P.I.E. Peter Lang.

Silveira, Alessandra, Mariana Canotilho, and Pedro Madeira Froufe. Citizenship and Solidarity in the European Union: From the Charter of Fundamental Rights to the Crisis, the State of the Art. Brussels, Belgium: P.I.E. Peter Lang, 2013.

Silveira, Alessandra, et al. Citizenship and Solidarity in the European Union: From the Charter of Fundamental Rights to the Crisis, the State of the Art. P.I.E. Peter Lang, 2013.