OBSERVATION OF 2-JET PRODUCTION IN DEEP-INELASTIC SCATTERING AT HERA - DERRICK, M; KRAKAUER, D; MAGILL, S; MUSGRAVE, B; REPOND, J; REPOND, S; STANEK, R; TALAGA, RL; THRON, J; ARZARELLO, F; AYAD, R; BARI, G; et al. (PHYSICS LETTERS B, 1993)