Wenbin Liu Zhijian Ji The periodicity of square fuzzy matrices based on minimal strong components. 233-240 2002 126 Fuzzy Sets and Systems 2 http://www.sciencedirect.com/science/article/B6V05-452D8XD-9/2/f80f0f8e4cb1c638f8df6552b5bd74c4 db/journals/fss/fss126.html#LiuJ02