Meister, Erhard V.: Generalized Sommerfeld half-plane problems.
(English).
In:
Greguš, Michal (ed.): Equadiff 5.
Proceedings of the Fifth Czechoslovak Conference on Differential Equations and Their Applications held in Bratislava, August 24-28, 1981.
BSB B.G. Teubner Verlagsgesellschaft, Leipzig, 1982.
pp. 264-267