Olzak, S. (1989). Labor unrest, immigration and ethnic conflict in urban America, 1880-1914. Am.J.Sociol. 94:1303-33.
Walters, M. and Hoyle, C. (2012) Exploring the Everyday World of Hate Victimization Through Community Mediation. International Review of Victimology 18/1: 7-24.
Watts, M. (1996). Political Xenophobia in transition from socialism: threat, racism and ideology among East German Youth. Polit. Psychol. 17(1): 97- 126.