@article{MET_1991__38_2_176350,
     author = {A. Dey and A. Das},
     title = {Optimal {Variance-} and {Efficiency-Balanced} {Designs} for {One-and} {Two-Way} {Elimination} of {Heterogeneity.}},
     journal = {Metrika},
     pages = {227--238},
     publisher = {mathdoc},
     volume = {38},
     number = {2},
     year = {1991},
     zbl = {0735.62070},
     url = {http://geodesic.mathdoc.fr/item/MET_1991__38_2_176350/}
}