@article{GDZPPN002025507,
title = {On the Existence of Room Squares of Order 4n},
journal = {Aequationes mathematicae},
volume = {7},
year = {1971},
pages = {306-309},
zbl = {0236.05015},
url = {http://dml.mathdoc.fr/item/GDZPPN002025507}
}
MULLIN, R.C.; WALLIS, W.D. On the Existence of Room Squares of Order 4n. Aequationes mathematicae, Tome 7 (1971) pp. 306-309. http://gdmltest.u-ga.fr/item/GDZPPN002025507/