SPECTROSCOPIC INVESTIGATION OF THE SUBBAND EDGE RENORMALIZATION IN ELECTRON-HOLE PLASMAS IN GaAs/GaAlAs QUANTUM WELLS E. LACH, G. TRÄNKLE, A. FORCHEL et G. WEIMANN J. Phys. Colloques, 48 C5 (1987) C5-403-C5-406 DOI: 10.1051/jphyscol:1987586