1. Monotone flows and order intervals;Gouze;Nonlin. World,1994
2. Nonlinear Problems in Abstract Cones;Guo,1988
3. Monotone Iterative Techniques for Discontinuous Nonlinear Differential Equations;Heikkila,1994
4. Monotone Iterative Techniques for Nonlinear Differential Equations;Ladde,1985
5. Theory of Set Differential Equations in Metric Spaces;Lakshmikantham,2005