TY - JOUR AU - William Martin AU - J Sugar C2 - Physical Review A (Atomic, Molecular and Optical Physics) DA - 1996-01-01 LA - en M1 - 53 PB - Physical Review A (Atomic, Molecular and Optical Physics) PY - 1996 TI - Designations of ds2p Energy Levels in Neutral Zirconium, Hafnium, and Rutherfordium (Z=104) ER -