Solutions

Garnham, A. and J. Oakhill
[1994]  Thinking and Reasoning, Blackwell Publishers, Oxford

Gordon, William J.J.
[1961]  Synectics, Collier, London, 1970

Hoc, Jean-Michel
[1987, French Edition]  Cognitive Psychology of Planning, Academic Press, London, 1988
French Title : Psychologie Cognitive de la Planification

Mayer, Richard E.
[1983]  Thinking, Problem Solving, Cognition, W. H. Freeman & Co., New York, Second Edition 1992

Miller, George; Eugene Galanter; Karl H. Pribram
[1960]  Plans and the Structure of Behaviour, Holt, Rinehart and Winston, London, 1979

Mosconi, Giovanni and Vincenzo D'Urso, editors
[1973]  La Soluzione di Problemi, Giunti-Barbera, Firenze, 1991

Mosconi, Giovanni and Vincenzo D'Urso
[1974]  Il Farsi e il Disfarsi del Problema, Giunti-Barbera, Firenze

Pólya, George
[1945]  How to Solve It, Penguin Books, Harmondsworth, 1990

Simon, Herbert A.
[1969]  The Sciences of the Artificial, The MIT Press, Cambridge, Massachusetts, Second Edition 1988

Wason, P. C. and Johnson-Laird, editors
[1968]  Thinking and Reasoning, Penguin, Harmondsworth

Wertheimer, Max
[1954, First Enlarged Edition 1959]  Productive Thinking, Tavistock Publications, London, 1968