Unknown
Engblom, P Thörngren
;
Barsov, S
;
Bertelli, S
;
[et al.]
Contalbrigo, M
;
Chiladze, D
;
Kacharava, A
;
Lenisa, P
;
Lomidze, N
;
Lorentz, B
;
Macharashvili, G
;
Merzlyakov, S
;
Mikirtytchiants, S
;
Nass, A
;
Oellers, D
;
Rathmann, F
;
Schleichert, R
;
... and further 5
Institute of Physics