Butov, L. V.Campman, K. L.Chemla, D. S.Lai, C. W.Lozovik, Yu. E.2004-12-032004-12-0320012001http://hdl.handle.net/2003/168610.17877/DE290R-11464enThe American Physical SocietyPhysical Review Letters530Observation of Magnetically Induced Effective-Mass Enhancement of Quasi-2D Excitons10.1103/PhysRevLett.87.216804article (journal)