TY - JOUR AU - O. Cohen AU - Tenio Popmintchev AU - D. Gaudiosi AU - Margaret Murnane AU - Henry Kapteyn BT - Physical Review Letters DA - 2007-01 DO - 10.1103/PhysRevLett.98.043903 PY - 2007 T2 - Physical Review Letters TI - Unified Microscopic-Macroscopic Formulation of High-Order Difference-Frequency Mixing in Plasmas VL - 98 SN - 0031-9007 ER -