The Michigan Mathematical Journal · 1962 · 27 citations · 0 references
Natural SciencesMathematicsDifferential EquationsDynamical SystemsMathematical PhysicsExistence TheoremsExistence TheoryInitial Value ProblemsNonlinear DynamicsStability TheorySystems Of Differential EquationsAlmost Periodic SolutionsExistence ConditionsPeriodic Solutions Of Differential EquationsUniqueness Of Solutions