@article{MT_1989_15_a6,
     author = {V. N. Brezhnev and V. Ya. Ivanov},
     title = {Numerical algorithms for the solution of the synthesis problem of an electron-optical system},
     journal = {Matemati\v{c}eskie trudy},
     pages = {187--203},
     publisher = {mathdoc},
     volume = {15},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1989_15_a6/}
}