TY - JOUR AU - M. Seaton AU - P. Wilson BT - Journal of Physics B: Atomic and Molecular Physics DA - Jan-01-1972 DO - 10.1088/0022-3700/5/1/001 PY - 1972 SP - L1 EP - L3 T2 - Journal of Physics B: Atomic and Molecular Physics TI - A frozen cores approximation for atomic structure calculations UR - http://stacks.iop.org/0022-3700/5/i=1/a=001?key=crossref.3d3b04807b29b08c4ec21a047d8664b3 VL - 5 SN - 0022-3700 ER -