Sufficient conditions for the existence positive periodic solutions of a class of neutral delay models with feedback control.

Fengde Chen Faxin Lin Xiaoxin Chen Sufficient conditions for the existence positive periodic solutions of a class of neutral delay models with feedback control. 45-68 2004 158 Applied Mathematics and Computation 1 http://dx.doi.org/10.1016/j.amc.2003.08.063 db/journals/amc/amc158.html#ChenLC04