QUASI-BOUND STATES IN AN ASYMMETRIC GaAs-AlAs SUPERLATTICE J. SINGLETON, R.J. NICHOLAS, N.J. PULSFORD, N.R. COUCH et M. J. KELLY J. Phys. Colloques, 48 C5 (1987) C5-435-C5-437 DOI: 10.1051/jphyscol:1987592