@article{DAN_1977_237_3_a13,
     author = {S. P. Chernov and V. V. Mikhailin and A.V. Shepelev},
     title = {On the possibility of laser ultraviolet generation in crystals at the hard electromagnetic radiation pumping},
     journal = {Doklady Akademii Nauk},
     pages = {555--556},
     year = {1977},
     volume = {237},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_237_3_a13/}
}