%0 Journal Article
%A A. P. Kiselev
%T High-frequency source between the branches of hyperbola
%J Zapiski Nauchnykh Seminarov POMI
%D 1972
%P 79-100
%V 25
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1972_25_a4/
%G ru
%F ZNSL_1972_25_a4