On using explicit Runge-Kutta-Nyström methods for the treatment of retarded differential equations with periodic solutions.

G. Papageorgiou Ioannis Th. Famelis On using explicit Runge-Kutta-Nyström methods for the treatment of retarded differential equations with periodic solutions. 63-76 1999 102 Applied Mathematics and Computation 1 http://dx.doi.org/10.1016/S0096-3003(98)10020-6 db/journals/amc/amc102.html#PapageorgiouF99