@article{DAN_1986_291_3_a18,
     author = {A. V. Goncharsky and V. A. Danilov and V. V. Popov and I. N. Sisakyan and V. V. Stepanov},
     title = {On an inverse problem of optical element synthesis},
     journal = {Doklady Akademii Nauk},
     pages = {591--595},
     publisher = {mathdoc},
     volume = {291},
     number = {3},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_291_3_a18/}
}