Bellman, R., & Cooke, K. L. (1965). Asymptotic behavior of solutions of differential-difference equations. American Mathematical Society.
Chicago-viite (17. p.)Bellman, Richard, ja Kenneth L. Cooke. Asymptotic Behavior of Solutions of Differential-difference Equations. Providence, R.I: American Mathematical Society, 1965.
MLA-viite (9. p.)Bellman, Richard, ja Kenneth L. Cooke. Asymptotic Behavior of Solutions of Differential-difference Equations. American Mathematical Society, 1965.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.