@article{DAN_1981_261_4_a19,
     author = {\`E. F. Ibragimov and T. Usmanov},
     title = {On the theory of generation of high-power laser radiation second harmonic},
     journal = {Doklady Akademii Nauk},
     pages = {846--850},
     publisher = {mathdoc},
     volume = {261},
     number = {4},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_261_4_a19/}
}