TY  - JOUR
AU  - R.W. Cross
TI  - The essential state diagram of a linear operator
JO  - Annales Fennici Mathematici
PY  - 1990
SP  - 283
EP  - 291
VL  - 15
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1990.1506/
DO  - 10.5186/aasfm.1990.1506
LA  - en
ID  - AFM_1990_15_2_a5
ER  -