TY - JOUR AU - Bartels, R AU - Backus, S AU - Christov, I AU - Kapteyn, H AU - Murnane, M C2 - Chemical Physics DA - 2001-01-01 LA - en M1 - 267 PB - Chemical Physics PY - 2001 TI - Attosecond time-scale feedback control of coherent x-ray generation ER -