1. Dual variational methods in critical point theory and aplications,;A. Ambrosetti;J. Functional Analysis,1973
2. Nonlinear scalar field equations. I. Existence of a ground state,;H. Berestycki;Arch. Rational Mech. Anal.,1983
3. Nonlinear scalar field equations. II. Existence of infinitely many solutions,;H. Berestycki;Arch. Rational Mech. Anal.,1983
4. The nonlinear Klein-Gordon equation coupled with the Maxwell equations,;V. Benci;Nonlinear Anal.,2001
5. Solitary waves of the nonlinear Klein-Gordon equation coupled with the Maxwell equations,;V. Benci;Rev. Math. Phys.,2002