@proceedings {319,
	title = {Far-infrared harmonic generation from semiconductor heterostructures},
	volume = {1854},
	year = {1994},
	pages = {48-55},
	author = {Markelz, A.G. and Gwinn, E. G. and Sherwin, M. S. and Heyman, J. N. and Nguyen, C. and Kroemer, H.}
}
@proceedings {318,
	title = {Frequency Dependence of the Third Order Susceptibility of InAs Quantum Wells at Terahertz Frequencies},
	year = {1994},
	month = {08/1994},
	pages = {1193-1196},
	author = {Markelz, A.G. and Cerne, J. and Gwinn, E. G. and Brar, B. and Kroemer, H.}
}
