@article{05174700,
title = {The Carleman formula for the Helmholtz equation on the plane.},
journal = {Sibirskij Matematicheskij Zhurnal},
volume = {47},
year = {2006},
pages = {518-526},
zbl = {1115.35034},
language = {en},
url = {http://dml.mathdoc.fr/item/05174700}
}
Arbuzov, È. V.; Bukhgeim, A.L. The Carleman formula for the Helmholtz equation on the plane.. Sibirskij Matematicheskij Zhurnal, Tome 47 (2006) pp. 518-526. http://gdmltest.u-ga.fr/item/05174700/