1. Stability and Oscillation in Delay Differential Equations of Population Dynamics;Gopalsamy,1992
2. Global Hopf-bifurcation in a neural netlet;Gopalsamy;Appl. Math. Comput.,1998
3. Stability in asymptotic Hopfield nets with transmission delays;Gopalsamy;Physica D,1994
4. Oscillation Theory for Functional Differential Equations;Erbe,1995
5. Necessary and sufficient conditions for oscillations of neutral differential equations;Kulenovic;J. Aust. Math. Soc. Ser. B,1987