Electronic Resource
Hornshj, P.
;
Wilsky, K.
;
The ISOLDE Collaboration, CERN, Geneva, Switzerland
;
[et al.]
Hansen, P.G.
;
Jonson, B.
;
Alpsten, M.
;
Andersson, G.
;
Appelqvist, Å.
;
Bengtsson, B.
;
Nielsen, O.B.
Amsterdam
:
Elsevier
Physics Letters B
34 (1971), S. 591-593