  The massive electrodynamics is applied to the Dirac equation to find the
generalized Volkov solution with massive photon field. The resulting equation
is the Riccati equation which cannot be solved in general. We use the
approximative Volkov function for massive photons and then consider an electron
in the periodic field and in the laser pulse of the delta-function form. We
derive the modified Compton formulas for the interaction of the multiphoton
object with an electron for both cases.
