Evtushenko, Evgenii (1963). Precocious Autobiography. New York: Dutton. pp. 88–102, quoted in "Mourners Crushed at Stalin's Funeral". Seventeen Moments in Soviet History. Michigan State University. September 2015.
Ripley, Amanda (19 January 2009). "How Not To Get Trampled at the Inauguration". Slate. Retrieved 12 May 2009. Article acknowledges traffic engineer John J. Fruin and G. Keith Still of Crowd Dynamics Ltd.
Fruin 2002, p. 6. Fruin, John (January 2002) [First presented March 1993]. The Causes and Prevention of Crowd Disasters(PDF). First International Conference on Engineering for Crowd Safety (crowdsafe.com ed.). Archived(PDF) from the original on 30 April 2021.
Fruin 2002, p. 5: "Virtually all crowd deaths are due to compressive asphyxia and not the 'trampling' reported by the news media." Fruin, John (January 2002) [First presented March 1993]. The Causes and Prevention of Crowd Disasters(PDF). First International Conference on Engineering for Crowd Safety (crowdsafe.com ed.). Archived(PDF) from the original on 30 April 2021.
Fruin 2002, p. 6. Fruin, John (January 2002) [First presented March 1993]. The Causes and Prevention of Crowd Disasters(PDF). First International Conference on Engineering for Crowd Safety (crowdsafe.com ed.). Archived(PDF) from the original on 30 April 2021.
Fruin 2002, p. 5: "Virtually all crowd deaths are due to compressive asphyxia and not the 'trampling' reported by the news media." Fruin, John (January 2002) [First presented March 1993]. The Causes and Prevention of Crowd Disasters(PDF). First International Conference on Engineering for Crowd Safety (crowdsafe.com ed.). Archived(PDF) from the original on 30 April 2021.
