On the infinite summation in the theory of atomic multiphoton ionization

The perturbation theory for multiphoton ionization of atoms

Theory of Multiphoton Ionization of Atoms

A Contribution Towards the Theory of Multichannel Multiphoton Ionization of Atoms

Multiphoton Ionization of Atomic Hydrogen Using Perturbation Theory

Selection rules for atom multiphoton ionization by intense light in a non-perturbative theory

Line shape theory in atomic resonant multiphoton ionization