París: Ruedo Ibérico, 1971.
Etiqueta: León Trotski
Leon Trotsky. The Real Situation in Russia.
Nueva York: Harcourt, Brace And Company / Londres: George Allen&Unwin, 1928.
Thomas Ray Poole. «Counter-trial»: Leon Trotsky on the Soviet purge trials.
Amherst: University of Massachusetts, 1974.
Boris Souvarine. Una controversia con Trotski.
Culiacán, Sinaloa: Universidad Autónoma de Sinaloa, 1983.