TY  - JOUR
AU  - D. D. Pervouchine
TI  - On the closures of orbits of fourth order matrix pencils
JO  - Izvestiya. Mathematics 
PY  - 2002
SP  - 1047
EP  - 1055
VL  - 66
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_2002_66_5_a4/
LA  - en
ID  - IM2_2002_66_5_a4
ER  -