Bellman R., Cooke K.L. Differential-Difference Equations

Academic Press, 1963. — 482 p. — ISBN10: 012410973X, ISBN13: 978-0124109735.The Laplace Transform.
Linear Differential Equations.
First-order Linear Differential-Difference Equations of Retarded Type with Constant Coefficients.
Series Expansions of Solutions of First-order Equations of Retarded Type.
First-order Linear Equations of Neutral and Advanced Type with Constant Coefficients.
Linear Systems of Differential-Difference Equations with Constant Coefficients.
The Renewal Equation.
Systems of Renewal Equations.
Asymptotic Behavior of Linear Differential-Difference Equations.
Stability of Solutions of Linear Differential-Difference Equations.
Stability Theory and Asymptotic Behavior for Nonlinear Differential-Difference Equations.
Asymptotic Location of the Zeros of Exponential Polynomials.
On Stability Properties of the Zeros of Exponential Polynomials.