@article{DAN_1983_273_3_a20,
     author = {Yu. V. Shestopalov},
     title = {Existence of a discrete spectrum of normal waves of microstrip},
     journal = {Doklady Akademii Nauk},
     pages = {592--596},
     publisher = {mathdoc},
     volume = {273},
     number = {3},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_273_3_a20/}
}