Contagion in Mass Killings and School Shootings Towers, Sherry ; Gomez-Lievano, Andres ; Khan, Maryam ; Mubayi, Anuj ; Castillo-Chavez, Carlos Abstract Publication: PLoS ONE Pub Date: July 2015 DOI: 10.1371/journal.pone.0117259 Bibcode: 2015PLoSO..1017259T