Authors:
Fiore, F
Giommi, P
Vignali, C
Comastri, A
Matt, G
Perola, GC
La Franca, F
Molendi, S
Tamburelli, F
Antonelli, LA
Citation: F. Fiore et al., The BeppoSAX High Energy Large Area Survey (HELLAS) - II. Number counts and X-ray spectral properties, M NOT R AST, 327(3), 2001, pp. 771-780