@article{MET_1987__34_176121,
     author = {Czesiaw Stepniak},
     title = {Reduction {Problems} in {Comparison} of {Linear} {Models.}},
     journal = {Metrika},
     pages = {211--216},
     publisher = {mathdoc},
     volume = {34},
     year = {1987},
     zbl = {0649.62067},
     url = {http://geodesic.mathdoc.fr/item/MET_1987__34_176121/}
}