TY - JOUR AU - Keith Burnett AU - John Cooper AU - R. Ballagh AU - E. Smith BT - Physical Review A DA - Jan-11-1980 DO - 10.1103/PhysRevA.22.2005 PY - 1980 SP - 2005 EP - 2026 T2 - Physical Review A TI - Collisional redistribution of radiation. I. The density matrix VL - 22 SN - 0556-2791 ER -