Yankui Liu Siyuan Shen Rui Qin Particle Swarm Optimization for Two-Stage FLA Problem with Fuzzy Random Demands. 776-785 2008 ISNN (1) http://dx.doi.org/10.1007/978-3-540-87732-5_86 conf/isnn/2008-1 db/conf/isnn/isnn2008-1.html#LiuSQ08