@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/