TY - JOUR AU - Carlos Hernández-García AU - Jose Pérez-Hernández AU - Tenio Popmintchev AU - Margaret Murnane AU - Henry Kapteyn AU - Agnieszka Jaron-Becker AU - Andreas Becker AU - Luis Plaja BT - Physical Review Letters DA - 2013-07 DO - 10.1103/PhysRevLett.111.033002 PY - 2013 EP - 033002 T2 - Physical Review Letters TI - Zeptosecond High Harmonic keV X-Ray Waveforms Driven by Midinfrared Laser Pulses UR - http://link.aps.org/doi/10.1103/PhysRevLett.111.033002 VL - 111 SN - 0031-9007 ER -