@article{DAN_1969_188_4_a16,
     author = {A. L. Duischko and V. N. Lugovoi and A. M. Prokhorov},
     title = {On self-focussing of intense light beams},
     journal = {Doklady Akademii Nauk},
     pages = {792--794},
     publisher = {mathdoc},
     volume = {188},
     number = {4},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_188_4_a16/}
}