[13]D’Angelo B, Wierzbick M. Relations of daily hassles with anxious and depressed mood in students. Psycho Rep.2003,92(2).(416-418)
[14]CV Laar, S Levin, S Sinclair, J Sidanius. The effect of university roommates contact in ethnic attitudes and behavior. Journal of Experimental Social Psychology.2005,41(4).(329-345)