@article{DAN_1981_256_1_a5,
     author = {P. S. Knopov},
     title = {On weak convergence of measures generated by iterative procedures in a {Hilbert} space},
     journal = {Doklady Akademii Nauk},
     pages = {29--32},
     year = {1981},
     volume = {256},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_256_1_a5/}
}