DIAMAGNETIC SHIFTS OF QUANTUM WELL EXCITONS IN STRONG MAGNETIC FIELDS APPLIED IN THE WELL PLANES N.J. PULSFORD, J. SINGLETON, R.J. NICHOLAS and C.T.B. FOXON J. Phys. Colloques, 48 C5 (1987) C5-231-C5-234 DOI: 10.1051/jphyscol:1987548