TY  - JOUR
AU  - J.R. Dorroh
TI  - Semigroups of operators and second-order Cauchy problems.
JO  - Semigroup forum
PY  - 1985
SP  - 297
EP  - 304
VL  - 31
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1985__31_134755/
ID  - SF_1985__31_134755
ER  -