Direct evidence for oscillatory screening in the quantum Hall effect regime A. Raymond, B. Couzinet, M. I. Elmezouar, M. Kubisa, W. Zawadzki and B. Etienne Europhys. Lett., 43 3 (1998) 337-342 Published online: 01 September 2002 DOI: 10.1209/epl/i1998-00362-7