Ian F. Blake, J. J. Stiffler. A note on generalized Room squares. Discrete Mathematics, 21(1):89-93, 1978. [doi]
@article{BlakeS78,
title = {A note on generalized Room squares},
author = {Ian F. Blake and J. J. Stiffler},
year = {1978},
doi = {10.1016/0012-365X(78)90152-8},
url = {http://dx.doi.org/10.1016/0012-365X(78)90152-8},
researchr = {https://researchr.org/publication/BlakeS78},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {21},
number = {1},
pages = {89-93},
}