Unknown
Gavrilov, G Tz
;
Goutev, N
;
Dimitrov, B I
;
[et al.]
Tonev, D
;
Petkov, P
;
Angelis, G de
;
Recchia, F
;
Farnea, E
;
Ur, C A
;
Aydin, S
;
Bizzeti, P G
;
Bizzeti-Sona, A M
;
Deloncle, I
;
Gottardo, A
;
Laftchiev, H
;
Lunardi, S
;
... and further 9
Institute of Physics