@article{GDZPPN002443252,
title = {Trapping obstacles with nonhyperbolic periodic ray, asymptotic behaviour of solutions.},
journal = {Mathematische Zeitschrift},
volume = {217},
year = {1994},
pages = {143-166},
zbl = {0808.35067},
url = {http://dml.mathdoc.fr/item/GDZPPN002443252}
}
Farhy, Leon S. Trapping obstacles with nonhyperbolic periodic ray, asymptotic behaviour of solutions.. Mathematische Zeitschrift, Tome 217 (1994) pp. 143-166. http://gdmltest.u-ga.fr/item/GDZPPN002443252/