A New Comparison Method for Stability Theory of Differential Systems with Time-Varying Delays.

Zhigang Zeng Pei Yu Xiaoxin Liao A New Comparison Method for Stability Theory of Differential Systems with Time-Varying Delays. 169-186 2008 18 I. J. Bifurcation and Chaos 1 http://dx.doi.org/10.1142/S0218127408020215 db/journals/ijbc/ijbc18.html#ZengYL08