TY  - JOUR
AU  - ZHANG, LIANG
AU  - TANG, XIANHUA
TI  - PERTURBATIONS FROM INDEFINITE SYMMETRIC ELLIPTIC BOUNDARY VALUE PROBLEMS
JO  - Glasgow mathematical journal
PY  - 2017
SP  - 635
EP  - 648
VL  - 59
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089516000446/
DO  - 10.1017/S0017089516000446
ID  - 10_1017_S0017089516000446
ER  -