1. K. v. Klitzing, G. Dorda, and M. Pepper, Phys. Rev. Lett. 45, 494 (1980)
2. D.C. Tsui, H.L. Störmer, and A.C. Gossard, Phys. Rev. Lett. 48, 1761 (1982).
3. A thorough introduction to the quantum Hall Effect is available from several books on the topic: The Quantum Hall Effect, edited by Richard E. Prange S.M. Girvin (Springer-Verlag, New York, 1987) emphasizes major early developments in theory and experiment
4. Introduction to the Theory of the Integer Quantum Hall Effect, by M. Janssen, O. Viehweger, U. Fastenrath, and J. Hajdu (VCH Verlagsgesellschaft, Weinheim, 1994) emphasizes localization physics important for the integer quantum Hall effect
5. The Fractional Quantum Hall Effect by T. Chakraborty and P. Pietiläinen emphasizes numerical exact diagonalization studies of the fractional quantum Hall effect; Quantum Hall Effect: A Perspective (Kluwer, Boston, 1989) by A.H. MacDonald is a reprint volume emphasizing the scientific context in which the quantum Hall effect discovery occurred; The Quantum Hall Effect, edited by Michael Stone is a reprint volume emphasizing topological aspects of the quantum Hall effect.