UNIVERSAL RELATION BETWEEN BAND RENORMALIZATION AND CARRIER DENSITY IN TWO-DIMENSIONAL ELECTRON-HOLE PLASMAS G. TRÄNKLE, E. LACH, A. FORCHEL, C. ELL, H. HAUG, G. WEIMANN, G. GRIFFITHS, H. KROEMER and S. SUBBANNA J. Phys. Colloques, 48 C5 (1987) C5-385-C5-388 DOI: 10.1051/jphyscol:1987582