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Kraus, J. and Ils, P. and Schüller, Christian and Schaack, G. and Ebeling, J. K. and Schlapp, W. and Weimann, G. (1991) The coupling of intersubband transitions and the quantum-well LO phonon in p-doped GaAs-GaAlAs multiple-quantum wells. Journal of Physics: Condensed Matter 3 (42), pp. 8267-8279.
Dahl, M. and Ils, P. and Kraus, J. and Müller, B. and Schaack, G. and Schüller, Christian and Ebeling, J. K. and Weimann, G. (1991) Hole-intersubband excitations and luminescence transitions in p-doped GaAs---AlGaAs multiple quantum wells. Superlattices and Microstructures 9 (1), pp. 77-81.