@article{GDZPPN002027054,
title = {On the Existence of Room Squares},
journal = {Aequationes mathematicae},
volume = {9},
year = {1973},
pages = {260-266},
zbl = {0267.05015},
url = {http://dml.mathdoc.fr/item/GDZPPN002027054}
}
WALLIS, W.D. On the Existence of Room Squares. Aequationes mathematicae, Tome 9 (1973) pp. 260-266. http://gdmltest.u-ga.fr/item/GDZPPN002027054/