1990

1. Critical point theorems and applications to nonlinear boundary value problems

   Nonlinear Analysis, Vol. 14, Núm. 5, pp. 393-411

2. The dual variational principle and discontinuos elliptic problems with strong resonance at infinity

   Nonlinear Analysis, Vol. 15, Núm. 12, pp. 1145-1154

3. The dual variational principle and discontinuous elliptic problems with strong resonance at infinity

   Extracta mathematicae, Vol. 5, Núm. 1, pp. 12-14