Bibcode:1990CPL...169..529L. doi:10.1016/0009-2614(90)85642-P. Plass, Richard; Kenneth Egan; Chris Collazo-Davila; Daniel Grozea; Eric Landree; Laurence D.
Project Byrne, R.M.J. (2005). The Rational Imagination: How People Create Alternatives to Reality. Cambridge, MA: MIT Press Egan, Kieran (1992). Imagination