@article{DAN_1981_261_5_a22,
     author = {V. P. Shestopalov},
     title = {On nonlinear processes in the diffraction radiation generators -- free electron lasers},
     journal = {Doklady Akademii Nauk},
     pages = {1116--1118},
     publisher = {mathdoc},
     volume = {261},
     number = {5},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_261_5_a22/}
}