TY  - JOUR
AU  - Bhatia, R.
AU  - Elsner, L.
TI  - Symmetries and Variation of Spectra
JO  - Canadian journal of mathematics
PY  - 1992
SP  - 1155
EP  - 1166
VL  - 44
IS  - 6
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1992-069-3/
DO  - 10.4153/CJM-1992-069-3
ID  - 10_4153_CJM_1992_069_3
ER  -