found: Ponzone, L. Il Partito radicale nella politica italiana, 1962-1989, 1993.
found: Wikipedia, April 11, 2017:Radical Party (Italy) (The Radical Party (Italian: Partito radicale, PR) was a political party in Italy. For decades it was a bastion of liberalism and radicalism in Italy and proposed itself as the strongest opposition to the Italian political establishment, seen as corrupt and conservative. Although it never reached high shares of vote and never participated in government, the party had close relations with the other parties of the Italian left; founded in 1955 and transformed in 1989 into the Transnational Radical Party [an NGO affiliated with the UN's EcoSoc since 1995])
found: Wikipedia, Italian version, September 12, 2018(Partito Radicale Transnazionale; simpler name for Partito radicale nonviolento transnazionale e transpartito; PRT; in 1989 the Partito Radical as such suspended its participation in electoral campaigns; the logo of the Transnational Radical Party was designed in 1988 by graphic designer Paolo Budassi)