Adelle Howse. Minimal critical sets for some small Latin squares. Australasian J. Combinatorics, 17:275-288, 1998. [doi]
@article{Howse98,
title = {Minimal critical sets for some small Latin squares},
author = {Adelle Howse},
year = {1998},
url = {http://ajc.maths.uq.edu.au/pdf/17/ocr-ajc-v17-p275.pdf},
researchr = {https://researchr.org/publication/Howse98},
cites = {0},
citedby = {0},
journal = {Australasian J. Combinatorics},
volume = {17},
pages = {275-288},
}