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Margull, U. and Spangler, J. and Prettl, Wilhelm (1994) Intermittent breakdown of current-oscillation tori in n-type GaAs epitaxial layers. Physical Review B (PRB) 50 (19), pp. 14166-14170.
Spangler, J. and Margull, U. and Prettl, Wilhelm (1992) Regular and chaotic current oscillations in n-type GaAs in transverse and longitudinal magnetic fields. Physical Review B (PRB) 45 (20), pp. 12137-12140.