@article{VSPUI_2016_1_a1,
     author = {E. M. Vinogradova and A. V. Listrukova},
     title = {The electrostatic quadrupole lens mathematical modeling},
     journal = {Vestnik Sankt-Peterburgskogo universiteta. Prikladna\^a matematika, informatika, processy upravleni\^a},
     pages = {19--27},
     publisher = {mathdoc},
     number = {1},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSPUI_2016_1_a1/}
}