@article{ZNSL_1981_108_a4,
     author = {M. S. Ermakov},
     title = {On the rank of necessary and sufficient statistics for a~sample of multivariate distributions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {57--71},
     year = {1981},
     volume = {108},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1981_108_a4/}
}