Lichtenwald, T. G., and F. S. Perri. “The Case of Ditto Block: A Study of Special Weapons and Tactics, Antisocial Personality, Mental Illness and Barricade Offenders”. International Journal of Criminology and Sociology, vol. 7, Mar. 2018, pp. 59-114, doi:10.6000/1929-4409.2018.07.06.