@article{ZNSL_1979_89_a21,
     author = {I. A. Molotkov and A. S. Starkov},
     title = {Letter to the editors: {{\textquotedblleft}Local} degeneration of waves in a~thin waveguide{\textquotedblright} {(Zap.} {Nau\v{c}n.} {Sem.} {Leningrad.} {Otdel.} {Mat.} {Inst.} {Steklov.} {(LOMI)} 78 (1978), 138{\textendash}148)},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {286},
     year = {1979},
     volume = {89},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1979_89_a21/}
}