«Contenção e Transgressão – As Mobilizações Sociais e o Estado nas Transições Espanhola e Portuguesa», written by the political scientist Rafael Durán Muñoz, is a comparative study into the social democratization of Portugal and Spain. 

The author analyses the differences between the social radicalization within Portugal and an equivalent absence in Spain. This occured as a result of the inherent differences between the two countries.