@article{GDZPPN002200872,
title = {Highfrequency asymptotics of the field scattered by an obstacle near tangential rays.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {341},
year = {1983},
pages = {39-62},
zbl = {0519.35019},
url = {http://dml.mathdoc.fr/item/GDZPPN002200872}
}
Alber, H.D. Highfrequency asymptotics of the field scattered by an obstacle near tangential rays.. Journal für die reine und angewandte Mathematik, Tome 341 (1983) pp. 39-62. http://gdmltest.u-ga.fr/item/GDZPPN002200872/