Search for diphoton events with large missing transverse energy in pp̄ collisions at √s = 1.8 TeV - Abachi, S; Abbott, B; Abolins, M; Acharya, B; Adam, I; Adams, D; Adams, M; Ahn, S; Aihara, H; Álvarez, G; Alves, G; Amidi, E; et al. (Physical Review Letters, 1997)