TY - JOUR AU - Peter Mohr AU - J Sapirstein C2 - Physical Review A (Atomic, Molecular and Optical Physics) DA - 2000-11-01 LA - en M1 - 62 PB - Physical Review A (Atomic, Molecular and Optical Physics) PY - 2000 TI - Evaluation of Two-Photon Exchange Graphs for Excited States of Highly Charged Heliumlike Ions ER -