Impossibility results in the presence of multiple faulty processes - Taubenfeld, Gadi; Katz, Shmuel; Moran, Shlomo (haṭ- Ṭeḵniyyôn, Māḵôn Ṭeḵnôlôgî le-Yiśrā'ēl <Ḥêfā> / Department of Computer Science: Technical report, 1989)