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)