@article{MAN_1961__143_160866,
     author = {M.M. RAO},
     title = {Theory of {Lower} {Bounds} for {Risk} {Functions} in {Estimation.}},
     journal = {Mathematische Annalen},
     pages = {379--398},
     publisher = {mathdoc},
     volume = {143},
     year = {1961},
     zbl = {0114.35602},
     url = {http://geodesic.mathdoc.fr/item/MAN_1961__143_160866/}
}