TY  - JOUR
AU  - Robinson, E. Arthur
TI  - Non-abelian extensions have nonsimple spectrum
JO  - Compositio Mathematica
PY  - 1988
SP  - 155
EP  - 170
VL  - 65
IS  - 2
PB  - Kluwer Academic Publishers
UR  - http://archive.numdam.org/item/CM_1988__65_2_155_0/
LA  - en
ID  - CM_1988__65_2_155_0
ER  -