Bartels, R.Christov, I. P.Kapteyn, H. C.Murnane, M. M.2004-12-142004-12-1420012001http://hdl.handle.net/2003/1880010.17877/DE290R-1559enThe American Physical SocietyPhysical Review Letters530Attosecond Time-Scale Intra-atomic Phase Matching of High Harmonic Generation10.1103/PhysRevLett.86.5458article (journal)