@article{DAN_1979_246_3_a22,
     author = {I. I. Plyusnina},
     title = {Infrared spectra of opals},
     journal = {Doklady Akademii Nauk},
     pages = {606--609},
     year = {1979},
     volume = {246},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_246_3_a22/}
}