TY  - JOUR
A1  - Brasche, Johannes F.
A1  - Koshmanenko, V. D.
A1  - Neidhardt, Hagen
T1  - Some new aspects of Krein's extension theory
Y1  - 1994
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/28619
ER  -