Classification of Solutions of Second Order Nonlinear Neutral Difference Equations of Mixed Type
          Salvarangam, S.; Geetha, S.; Thandapani, E.; Pinelas, Sandra  
          
          Journal Dynamics of Continuous, Discrete and Impulsive Systems, Series B: Applications and Algoritms, 23 (2016), 433-447  
          http://online.watsci.org/abstract_pdf/2016v23/v23n6b-pdf/4.pdf  
           
            
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