Thornton, Arland D; Caspi, A; Moffitt, T E; Freedman, Deborah S; Amell, J W; Harrington, H; Smeijers, J; Silva, P A. (1996). The life history calendar: A research and clinical assessment method for collecting retrospective event-history data. International Journal of Methods in Psychiatric Research. 6, 101-114.