TY  - RPRT
TI  - Solving combinatorial problems: the 15-puzzle.
AU  - Zygmunt Pizlo
AU  - Zheng Li
PY  - 2005
DO  - 10.3758/bf03193214
UR  - https://pubmed.ncbi.nlm.nih.gov/16496727/
ID  - 16496727
ER  -