@article{VMUMM_2018_4_a9,
     author = {I. A. Proskurnin},
     title = {Equivariant sufficiency and stability},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {56--60},
     year = {2018},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2018_4_a9/}
}