TY - JOUR AU - M. Du AU - J. Delos BT - Physical Review A DA - Jan-08-1988 DO - 10.1103/PhysRevA.38.1913 PY - 1988 SP - 1913 EP - 1930 T2 - Physical Review A TI - Effect of closed classical orbits on quantum spectra: Ionization of atoms in a magnetic field. II. Derivation of formulas UR - http://link.aps.org/doi/10.1103/PhysRevA.38.1913 VL - 38 SN - 0556-2791 ER -