P. Bagnaia, M. Borghini, J. Buerger, A.G. Clark, P. Darriulat, et al.. Observation of electrons produced in association with hard jets and large missing transverse momentum in $p\bar p$ collisions at $\sqrt s$ = 540 GeV.
Physics Letters B, Elsevier, 1984, 139, pp.105-114.
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