The deep near-infrared southern sky survey (DENIS) - Epchtein, N; De Batz, B; Capoani, L; Chevallier, L; Copet, E; Fouqué, P; Lacombe, F; Le Bertre, T; Pau, S; Rouan, D; Ruphy, S; Simon, G; et al. (The Messenger, 1997)