@article{AM2_1973__9_136327,
     author = {P.J. SCHELLENBERG},
     title = {On {Balanced} {Room} {Squares} and {Complete} {Balanced} {Howell} {Rotations}},
     journal = {Aequationes mathematicae},
     pages = {75--90},
     publisher = {mathdoc},
     volume = {9},
     year = {1973},
     zbl = {0258.05018},
     url = {http://geodesic.mathdoc.fr/item/AM2_1973__9_136327/}
}