@article{DAN_1976_231_3_a19,
     author = {N. A. Tikhonov},
     title = {On modeling of beam self-focusing},
     journal = {Doklady Akademii Nauk},
     pages = {592--594},
     publisher = {mathdoc},
     volume = {231},
     number = {3},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_231_3_a19/}
}