1. L. L. Chang, L. Esaki and R. Tsu, “Resonant Tunneling in Semiconductor Double Barriers”, Appl. Phys. Lett. 24, 593 (1974).
2. L. L. Chang, L. Esaki, A. Segmuller and R. Tsu, “Resonant Electron Transport in Semiconductor Barrier Structures”, in Proc. 12th Int. Conf. Semicond. Phys., ed. by M. H. Pilkuhn, Stuttgart 1974 (B. G. Teubner, Stuttgart, 1974), p. 688.
3. L. Esaki and L. L. Chang, “New Transport Phenomenon in a Semiconductor Superlattice”, Phys. Rev. Lett. 33, 495 (1974).
4. D. Bohm, “Quantum Theory” (Prentice-Hall, Englewood, 1951), p. 283.
5. E. O. Kane, in Tunneling Phenomena in Solids, ed. by E. Burstein and S. Lundquist (Plenum, New York, 1969), p. 1.