Candan T.2019-08-012019-08-0120181300-0098https://dx.doi.org/10.3906/mat-1704-41https://hdl.handle.net/11480/1715In this work, we consider two types of second-order neutral differential equations and we obtain sufficient conditions for the existence of positive ?-periodic solutions for these equations. We employ Krasnoselskii's fixed point theorem for the sum of a completely continuous and a contraction mapping. An example is included to illustrate our results. © TÜBI'KTAK.eninfo:eu-repo/semantics/openAccessFixed pointNeutral equationsPositive periodic solutionSecond-orderExistence of positive periodic solution of second-order neutral differential equationsArticle42379780610.3906/mat-1704-412-s2.0-85046826993Q2348901WOS:000439014600006Q3