TY - JOUR AU - S. Haan AU - John Cooper BT - Physical Review A DA - Jan-12-1983 DO - 10.1103/PhysRevA.28.3349 PY - 1983 SP - 3349 EP - 3354 T2 - Physical Review A TI - Unitarity, the pole approximation, and interference between radiative emission and autoionization VL - 28 SN - 0556-2791 ER -