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