Limits of a stationary phase method for ionization of atoms in strong laser fields Requate, A Requate A Becker, A Becker A Faisal, Farhad Faisal Farhad A stationary phase approach to a typical S-matrix expansion for atomic ionization in strong laser fields is examined with respect to its range of validity. (C) 2003 Elsevier B.V. All rights reserved. 319 1-2 145-149 145-149 ELSEVIER SCIENCE BV 2003