4. Sverdlov feud: Sverdlov, Izbrannye, pp. 266–80, 321. Gorodetsky and Sharapov, Sverdlov, pp. 99–103. GARF 5449.1.63 and 75, B. I. Ivanov. A. M., A. S. and F. A. Taraseev memoirs: RGASPI 558.4.581,667 and 662. On movements from house to house in Kureika: Ostrovsky, pp. 397–99. Antonov-Ovseenko, Stalin bez maski, pp. 380–90. Ostrovsky believes there may have been an escape attempt: Ostrovsky, pp. 402–3. Kun, pp. 169–75.