Observation of anisotropic event shapes and transverse flow in ultrarelativistic 'AU'+'AU' collisions - Barrete, J; Bellwied, R; Bennett, S; Braun-Munzinger, P; Cleland, W E; Clemen, M; Cole, J; Cormier, T M; David, G; Dee, J; Dietzsch, Olácio; Drigert, M; et al. (Physical Review Letters, 1994)