@article{DAN_1988_301_1_a18,
     author = {G. O. Karapetyan and G. T. Petrovskiǐ and N. V. Remizov and V. V. Rusan and R. G. Khorenyan},
     title = {Ion exchange in phosphate glasses for the gradient optics},
     journal = {Doklady Akademii Nauk},
     pages = {84--88},
     publisher = {mathdoc},
     volume = {301},
     number = {1},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_301_1_a18/}
}