%0 Journal Article %K bullying %K aggressive behavior %K Gender %K group %K Epidemiology %B Ansiedad y Estrés %D 2009 %I Sociedad Española para el Estudio de la Ansiedad y el Estrés %N 2-3 %P 193-205 %T An analysis of bullying at school from a gender and group perspective %V 15 %8 07/2009 %9 Journal Article %@ 2174-0437