%0 Journal Article %A Christiansen, Søren %T Computation of Sommerfeld's attenuation function %J Applications of Mathematics %D 1973 %P 379-384 %V 18 %N 5 %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1973.103491/ %R 10.21136/AM.1973.103491 %G en %F 10_21136_AM_1973_103491