1. First suicide note?;Thomas;Br Med J,1980
2. History in the study of suicide;Rosen;Psychol Med,1971
3. Observations on nosological issues in the classification of suicidal behavior;Zubin,1974
4. Suicide;Durkheim,1951
5. Classifications of suicidal phenomena;Shneidman;Bull Suicidology,1968