1. “Magnetotransport properties of Si-δ-doped InSb layers grown on GaAs”. de Keyser A, Bogaerts R, van Bockstal L, Hoeks W, Herlach F, Karavolas VC, Peeters FM, van de Graaf W, Borghs G, Physica: B : condensed matter 211, 455 (1995).   http://doi.org/10.1016/0921-4526(94)01092-F