TY  - JOUR
AU  - P. D. Lamberti
AU  - L. Provenzano
TI  - A maximum principle in spectral optimization problems for elliptic operators subject to mass density perturbations
JO  - Eurasian mathematical journal
PY  - 2013
SP  - 70
EP  - 83
VL  - 4
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/EMJ_2013_4_3_a6/
LA  - en
ID  - EMJ_2013_4_3_a6
ER  -