TY  - JOUR
AU  - È. R. Tsekanovskii
TI  - Friedrichs and Krein extensions of positive operators and holomorphic contraction semigroups
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1981
SP  - 91
EP  - 92
VL  - 15
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1981_15_4_a17/
LA  - ru
ID  - FAA_1981_15_4_a17
ER  -