@article{DAN_1976_231_2_a16,
     author = {A. S. Reztsov and N. A. Tikhonov},
     title = {On self-focusing of non-axisymmetric beam},
     journal = {Doklady Akademii Nauk},
     pages = {324--325},
     publisher = {mathdoc},
     volume = {231},
     number = {2},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_231_2_a16/}
}