TY  - JOUR
AU  - Hitrik, Michael
AU  - Sjöstrand, Johannes
TI  - Non-Selfadjoint Perturbations of Selfadjoint Operators in Two Dimensions IIIa. One Branching Point
JO  - Canadian journal of mathematics
PY  - 2008
SP  - 572
EP  - 657
VL  - 60
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-2008-028-3/
DO  - 10.4153/CJM-2008-028-3
ID  - 10_4153_CJM_2008_028_3
ER  -