Unknown
Quintans, C
;
Collaboration, the Na50
;
Alessandro, B
;
[et al.]
Alexa, C
;
Arnaldi, R
;
Atayan, M
;
Beolè, S
;
Boldea, V
;
Bordalo, P
;
Borges, G
;
Castanier, C
;
Castor, J
;
Chaurand, B
;
Cheynis, B
;
Chiavassa, E
;
Cicalò, C
;
... and further 55
Institute of Physics