1016/0030-5073(77)90001-0 Merkle, E. C. The disutility of the hard-easy effect in choice confidence. Psychonomic Bulletin & Review. 2009, 16 (1): 204–213
Dreams, pp. 10, 34. Ruth Reinsel, John Antrobus, & Miriam Wollman (1992),“Bizarreness in Dreams and Waking Fantasy”, in Antrobus & Bertini (eds.), The Neuropsychology