1. Semiconductors and Semimetals, Dingle R., ed., 24, Boston: Academic Press, 1987
2. Weisbush C., and Vinter B., Quantum Semiconductor Heterostructures, Boston: Academic Press, 1991
3. Physics of nanostructures, Davies J.H., and Long A.R., eds., Bristol: Institute of Physics Publ., 1992
4. Cardona M., and Pinczuk A., Solid State Commun. 92, No. 1-2 (1994)
5. See a series of related papers in A Special Issue of IEEE J. Quantum Electronics, Chemla D., and Pinczuk A., eds., 1986