Electronic Resource
Chabot, M.
;
Nicolai, P.
;
Wohrer, K.
;
[et al.]
Chetioui, A.
;
Rozet, J.P.
;
Politis, M.F.
;
Touati, A.
;
Vernhet, D.
;
Stephan, C.
;
Gayet, R.
Amsterdam
:
Elsevier
Nuclear Inst. and Methods in Physics Research, B
56-57 (1991), S. 1-4