@article{MAN_1976__219_182768,
     author = {William C. Lydord},
     title = {Asymptotic {Energy} {Propagation} and {Scattering} of {Waves} in {Waveguides} with {Cylinders.}},
     journal = {Mathematische Annalen},
     pages = {193--212},
     publisher = {mathdoc},
     volume = {219},
     year = {1976},
     zbl = {0318.35056},
     url = {http://geodesic.mathdoc.fr/item/MAN_1976__219_182768/}
}