@article{10_4064_am35_3_5,
     author = {Matthias Eller},
     title = {Symmetric hyperbolic systems with
 boundary conditions that do not satisfy
 the {Kreiss{\textendash}Sakamoto} condition},
     journal = {Applicationes Mathematicae},
     pages = {323--333},
     publisher = {mathdoc},
     volume = {35},
     number = {3},
     year = {2008},
     doi = {10.4064/am35-3-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am35-3-5/}
}