Γ-X mixing in GaAs-Ga1-xAlxAs quantum wells under hydrostatic pressure M. E. Mora-Ramos, S. Y. López and C. A. Duque Eur. Phys. J. B, 62 3 (2008) 257-261 Published online: 19 April 2008 DOI: 10.1140/epjb/e2008-00161-6