Andreani, L. C.Pasquarello, Alfredo2009-10-082009-10-082009-10-08198910.1016/0749-6036(89)90068-2https://infoscience.epfl.ch/handle/20.500.14299/43326Theory of Excitons in GaAs-Ga$_{1-x}$Al$_x$As Quantum Wells Including Valence Band Mixingtext::journal::journal article::research article