References
- Burton , T. A. 1985 . Periodicity and limiting equations in Volterra systems . Bollettino U.M.I , 4 : 31 – 39 .
- Burton , T. A. 1985 . Stability and Periodic Solutions of Ordinary and Functional Differential Equations , Orlando, Florida : Academic Press .
- Gripenberg , G. 1980 . On the resolvents of nonconvolution Volterra kernels . Funkcialaj Ekvacioj , 23 : 83 – 95 .
- Grossman , S. I. and Miller , R.K. 1970 . Perturbation theory for Volterra integrodifferential systems . J. Differential Equations , 8 : 457 – 474 .
- Islam , M. N. 1988 . Periodic solutions of Volterra integral equations . Internat. J. Math. Math. Sol , 8 : 781 – 792 .
- Langenhop , C. E. 1985 . Periodic and almost periodic solutions of Volterra integral differential equations with infinite memory . J. Differential Equations , 58 : 391 – 403 .
- Miller , R. K. 1971 . Nonlinear Volterra Integral Equations , Melno Park, California : Benjamin .