@article{ZVMMF_1994_34_11_a1,
     author = {V. P. Il'in and I. Z. Livshits},
     title = {A symmetrized {Stone's} method},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1558--1566},
     publisher = {mathdoc},
     volume = {34},
     number = {11},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1994_34_11_a1/}
}