@article{MET_1972__19_175539,
     author = {H. Strasser},
     title = {Sufficiency and {Unbiased} {Estimation.}},
     journal = {Metrika},
     pages = {98--114},
     publisher = {mathdoc},
     volume = {19},
     year = {1972},
     zbl = {0255.62007},
     url = {http://geodesic.mathdoc.fr/item/MET_1972__19_175539/}
}