M. A. Ollis, Devin Willmott. There are Infinitely Many Williams Squares with Circular Structure and Order a Multiple of 4. Graphs and Combinatorics, 30(5):1223-1232, 2014. [doi]
@article{OllisW14,
title = {There are Infinitely Many Williams Squares with Circular Structure and Order a Multiple of 4},
author = {M. A. Ollis and Devin Willmott},
year = {2014},
doi = {10.1007/s00373-013-1342-8},
url = {http://dx.doi.org/10.1007/s00373-013-1342-8},
researchr = {https://researchr.org/publication/OllisW14},
cites = {0},
citedby = {0},
journal = {Graphs and Combinatorics},
volume = {30},
number = {5},
pages = {1223-1232},
}