Electronic Resource
Johansen, A.
;
Johnson, E.
;
Sarholt-Kristensen, L.
;
[et al.]
Steenstrup, S.
;
Gerritsen, E.
;
Denissen, C.J.M.
;
Keetels, H.
;
Politiek, J.
;
Sakamoto, I.
;
Hayashi, N.
Amsterdam
:
Elsevier
Nuclear Inst. and Methods in Physics Research, B
50 (1990), S. 119-126