@article{MET_1974__21_175630,
     author = {H. Drygas},
     title = {Regression {Estimation} from {Grouped} {Observations}  -  {HAITOVSKY,} {Y.}},
     journal = {Metrika},
     pages = {60--60},
     publisher = {mathdoc},
     volume = {21},
     year = {1974},
     url = {http://geodesic.mathdoc.fr/item/MET_1974__21_175630/}
}