@article{GDZPPN00117794X,
title = {Approximation of Pseudodifferential Operators in Absorbing Boundary Conditions for Hyperbolic Equations.},
journal = {Numerische Mathematik},
volume = {42},
year = {1983},
pages = {51-64},
zbl = {0536.35047},
url = {http://dml.mathdoc.fr/item/GDZPPN00117794X}
}
Wagatha, Ludwig. Approximation of Pseudodifferential Operators in Absorbing Boundary Conditions for Hyperbolic Equations.. Numerische Mathematik, Tome 42 (1983) pp. 51-64. http://gdmltest.u-ga.fr/item/GDZPPN00117794X/