@article{10_2298_PIM0475077K,
     author = {Reiner K\"uhnau},
     title = {Quasiconformal {Reflection} {Coefficient} and {Fredholm} {Eigenvalue} of an {Ellipse} of {Hyperbolic} {Geometry}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {77 },
     publisher = {mathdoc},
     volume = {_N_S_75},
     number = {89},
     year = {2004},
     doi = {10.2298/PIM0475077K},
     zbl = {1079.30020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/PIM0475077K/}
}