求助论文2篇,学校数据库里无法下载
Order-picking in a Rectangular warehouse:A Solvable Case of the Traveling Salesman Problem Operations Research
Ratliff.H.Donald Rosenthal 1983
Routing methods for warehouse with multiple cross aisles International Journal of Production Research
Roodbergen Kees Jan De Koster 2001
各位大神帮帮忙,感激不尽……


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