Nonlinear Analysis · 2007 · 23 citations · 15 references
Natural SciencesMathematicsDifferential EquationsDynamical SystemsContinuous Dynamical SystemsNonlinear DynamicsPartial Differential EquationsSystems Of Differential EquationsEigenfunction ExpansionsPeriodic Solutions Of Differential EquationsStability Of Functional Differential EquationsSturm - Liouville TheorySturm-liouville Theory
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Positive Solutions of Operator Equations.
A. R. Brodsky, M. A. Krasnosel’skii, Richard E. Flaherty et al. · American Mathematical Monthly · 1967 · 2.1K citations
John Toland · Bulletin of the London Mathematical Society · 1986 · 1.6K citations