Search for lightest neutralino and stau pair production in light gravitino scenarios with stau NLSP - Abreu,P; Adam,W; Adye,T; Adzic,P; Alderweireld,T; Alekseev,GD; Alemany,R; Allmendinger,T; Allport,PP; Almehed,S; Amaldi,U; Amato,S; et al. (EUROPEAN PHYSICAL JOURNAL C, 1999)