@article{DAN_1980_255_2_a0,
     author = {Ya. I. Al'ber and S. V. Shil'man},
     title = {On methods of stochastic approximation},
     journal = {Doklady Akademii Nauk},
     pages = {265--269},
     publisher = {mathdoc},
     volume = {255},
     number = {2},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_255_2_a0/}
}