@article{VMUMM_2016_4_a3,
     author = {D. V. Fufaev},
     title = {Convergence of products of operator orientations},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {23--33},
     year = {2016},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2016_4_a3/}
}