@article{DAN_1992_326_6_a1,
     author = {R. R. Gadyl'shin},
     title = {On a system of embedded resonators},
     journal = {Doklady Akademii Nauk},
     pages = {939--942},
     year = {1992},
     volume = {326},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_326_6_a1/}
}