@article{gusev_leite_olshanetskii_maude_cassé_portal_moshegov_toropov_1999,  title={Quantum hall effect in a wide parabolic quantum well},  volume={29},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97331999000400019},  DOI={10.1590/S0103-97331999000400019},  number={4},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Gusev, G.M. and Leite, J.R. and Olshanetskii, E.B. and Maude, D.K. and Cassé, M. and Portal, J.C. and Moshegov, N.T. and Toropov, A.I.},  year={1999},  month={Dec},  pages={715–718} }