@article{AM2_1971__6_136166,
     author = {J.D. HORTON and R.C. MULLIN},
     title = {A {Recursive} {Construction} for {Room} {Designs}},
     journal = {Aequationes mathematicae},
     pages = {39--45},
     publisher = {mathdoc},
     volume = {6},
     year = {1971},
     zbl = {0222.05022},
     url = {http://geodesic.mathdoc.fr/item/AM2_1971__6_136166/}
}