Lichtenstein, S; Slovic, P; Fischhoff, B; Layman, M; Combs, B (1978). "Judged frequency of lethal events". Journal of Experimental Psychology: Human Learning and Memory. 4 (6): 551–578. doi:10.1037/0278-7393.4.6.551. hdl:1794/22549.
Lichtenstein, S; Slovic, P; Fischhoff, B; Layman, M; Combs, B (1978). "Judged frequency of lethal events". Journal of Experimental Psychology: Human Learning and Memory. 4 (6): 551–578. doi:10.1037/0278-7393.4.6.551. hdl:1794/22549.