TY  - JOUR
AU  - J.D. Lawson
AU  - I. Chon
TI  - Problems on semigroups and control.
JO  - Semigroup forum
PY  - 1990
SP  - 245
EP  - 252
VL  - 41
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1990__41_2_135052/
ID  - SF_1990__41_2_135052
ER  -