Peter Winkler. Puzzled. Communications of the ACM, 53(3):118, 2010. [doi]
@article{Winkler10a,
title = {Puzzled},
author = {Peter Winkler},
year = {2010},
doi = {10.1145/1666420.1666447},
url = {http://doi.acm.org/10.1145/1666420.1666447},
researchr = {https://researchr.org/publication/Winkler10a},
cites = {0},
citedby = {0},
journal = {Communications of the ACM},
volume = {53},
number = {3},
pages = {118},
}