@article{MET_1983__30_175899,
     author = {J. Pfanzagl and W. Wefelmeyer},
     title = {Statistical {Estimation.} {Asymptotic} {Theory}   -  {Ibragimov,} {I.A;} {Has'minskii,} {R.Z.}},
     journal = {Metrika},
     pages = {142--143},
     year = {1983},
     volume = {30},
     url = {http://geodesic.mathdoc.fr/item/MET_1983__30_175899/}
}