Solving combinatorial problems: The 15-puzzle - Pizlo, Zygmunt; Li, Zheng (Memory & cognition, 2005)
Keywords: Algorithms; Approximation; Biological and medical sciences; Cognition. Intelligence; Experiments; Fundamental and applied biological sciences. Psychology; Human performance; Human subjects; Humans; Judgment; Problem Solving; Psychology. Psychoanalysis. Psychiatry; Psychology. Psychophysiology; Puzzles; Reasoning. Problem solving; Traveling salesman problem; Human; Problem solving; Cognition; Experimental study; Combinatorial problem