4Manzini R,Gamberi M,Rega2tieri A.Design and control ofan AS/ RS[J].Int J Adv Manuf Technol,2005,28(7):766-774.
5Caron F,Marchet G,Perego A.Routing policies and COI-based storage policies in picker-to-part systems[J].Int J Prod Res,1998,36 (3):713-732.
6Manzini R,Gamberi M,Rega2tieri A.Design and control of a Flexible Order-Picking Systems(FOPS) [J].Journal of Manufacturing Technology Management, 2005,16( 1 ) : 18-35.