TY - JOUR AU - Pan, L AU - Taylor, K AU - Clark, Charles C2 - Radiation Effects and Defects in Solids DA - 1991-01-01 00:01:00 LA - en M1 - 123 PB - Radiation Effects and Defects in Solids PY - 1991 TI - Convergence of Rayleigh-Schrödinger Perturbation Theory in Calculations of Multiphoton Processes, ER -