@article{MET_1995__42_3-4_176622,
     author = {Sudhir Gupta and Woo-Sun Lee and Sanpei Kageyama},
     title = {Nested {Balanced} {N-Ary} {Designs.}},
     journal = {Metrika},
     pages = {411--420},
     publisher = {mathdoc},
     volume = {42},
     number = {3-4},
     year = {1995},
     zbl = {0838.62059},
     url = {http://geodesic.mathdoc.fr/item/MET_1995__42_3-4_176622/}
}