TY - CONF AU - J Gao AU - J Delos C2 - Atomic and Molecular Physics , Quer{eacute}tero, MX DA - 1995-01-01 LA - en PB - Atomic and Molecular Physics , Quer{eacute}tero, MX PY - 1995 TI - Closed orbits and recurrences in atomic spectra: Patterns of trajectories in integrable systems, ed. by I. Alvarez, C. Cisneros and T.J. Morgan ER -