TY - JOUR AU - L. Rosenberg BT - Physical Review A DA - Jan-10-1979 DO - 10.1103/PhysRevA.20.1352 PY - 1979 SP - 1352 EP - 1358 T2 - Physical Review A TI - Sum rule and classical limit for scattering in a low-frequency laser field UR - http://link.aps.org/doi/10.1103/PhysRevA.20.1352 VL - 20 SN - 0556-2791 ER -