RT Article T1 The contribution of age structure to the international homicide decline JF PLOS ONE VO 14 IS 10 A1 Santos, Mateus R. A2 Lynch, James P. 1949- A2 Porter, Lauren C. A2 Testa, Alexander LA English YR 2019 UL https://krimdok.uni-tuebingen.de/Record/1912491974 DO 10.1371/journal.pone.0222996