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We study a relativistic two-dimensional electron gas in the presence of auniform external magnetic field and a random static scalar potential. Wecompute, in first order perturbation theory, the averages of the charge densityand of the transverse conductivity for a white-noise potential, and show that,within this treatment, their quantized values are modified by the disorder.Comment: ReVTeX, 7 pages, 1 ps figure. To appear in Mod. Phys. Lett. B. The  last reference was correcte

Perturbative Evidence of Nonuniversality in the Quantized Hall Conductivity of A Disordered Relativistic 2D Electron Gas