Upper and lower solutions for first order problems with nonlinear boundary conditions.
Daniel Franco; Juan J. Nieto; Donal O'Regan
Extracta Mathematicae (2003)
- Volume: 18, Issue: 2, page 153-160
- ISSN: 0213-8743
Daniel Franco; Juan J. Nieto; Donal O'Regan
Extracta Mathematicae (2003)