J. Scott Provan. Sudoku: Strategy versus Structure. The American Mathematical Monthly, 116(8):702-707, 2009. [doi]
@article{Provan09,
title = {Sudoku: Strategy versus Structure},
author = {J. Scott Provan},
year = {2009},
url = {http://www.jstor.org/stable/40391196},
researchr = {https://researchr.org/publication/Provan09},
cites = {0},
citedby = {0},
journal = {The American Mathematical Monthly},
volume = {116},
number = {8},
pages = {702-707},
}