@article{VNGU_2006_6_3_a4,
     author = {M. V. Neshchadim},
     title = {Solutions a system of {Maxwell} equations with null invariants},
     journal = {Sibirskij \v{z}urnal \v{c}istoj i prikladnoj matematiki},
     pages = {59--61},
     year = {2006},
     volume = {6},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VNGU_2006_6_3_a4/}
}