@Article{Essel2014,
author = "Essel, Emmanuel K. and Yankson, Ernest",
title = "On the existence of positive periodic solutions for totally nonlinear neutral differential equations of the second-order with functional delay",
journal = "Opuscula Math.",
year = "2014",
volume = "34",
number = "3",
pages = "469--481",
doi = "http://dx.doi.org/10.7494/OpMath.2014.34.3.469",
url = "http://dx.doi.org/10.7494/OpMath.2014.34.3.469",
abstract = "We prove that the totally nonlinear second-order neutral differential equation \[\frac{d^2}{dt^2}x(t)+p(t)\frac{d}{dt}x(t)+q(t)h(x(t))\] \[=\frac{d}{dt}c(t,x(t-\tau(t)))+f(t,\rho(x(t)),g(x(t-\tau(t))))\] has positive periodic solutions by employing the Krasnoselskii-Burton hybrid fixed point theorem.",
keywords = "Krasnoselskii, neutral, positive periodic solution",
issn = "1232-9274"
}