TY  - JOUR
AU  - Littman, Walter
TI  - Boundary control theory for hyperbolic and parabolic partial differential equations with constant coefficients
JO  - Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
PY  - 1978
SP  - 567
EP  - 580
VL  - 5
IS  - 3
PB  - Scuola normale superiore
UR  - http://www.numdam.org/item/ASNSP_1978_4_5_3_567_0/
UR  - https://zbmath.org/?q=an%3A0395.35007
UR  - https://www.ams.org/mathscinet-getitem?mr=507002
LA  - en
ID  - ASNSP_1978_4_5_3_567_0
ER  -