@article{MT_1990_18_a0,
     author = {A. M. Blokhin and I. Yu. Druzhinin and E. V. Mishchenko},
     title = {Theory and computation of third-order aberrations of cathode systems},
     journal = {Matemati\v{c}eskie trudy},
     pages = {3--75},
     year = {1990},
     volume = {18},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1990_18_a0/}
}