A survey on performance analysis of warehouse carousel systems
  This paper gives an overview of recent research on the performance evaluation and design of carousel systems. We discuss picking strategies for problems involving one carousel, consider the throughput of the system for problems involving two carousels, give an overview of related problems in this area, and present an extensive literature review. Emphasis has been given on future research directions in this area. 
Nelly Litvak, Maria Vlasiou
math.PR