The spectral figure of Amadeo Bordiga: a case study in the decline of Marxism in the West - John Chiaradia
John Chiaradia's 1972 dissertation on the left communist Amadeo Bordiga, specifically his political activities between 1912 and 1926, when he played a major role in the Italian Socialist party and later in the Italian Communist party, from which he and thousands of other anti-Stalinist communists were later expelled.