Tottle, op. cit., p. 97.

Tottle, op. cit., p. 100.

Tottle, op. cit., p. 99.

Tottle, op. cit., p. 101.

Tottle, op. cit., p. 101.

Alexei Fyodorov. The Underground Committee Carries On (Moscow: Progress Publishers).

Trotsky. The New Course, p. 72.

Trotsky. The New Course, p. 85.

Trotsky. Lettres aux travailleurs d’URSS (May 1940). La lutte antibureaucratique en URSS II: La revolution necessaire 1933–1940 (Paris: Union generale d’editions, 1975), pp. 301–302.