Du, D.-Z.D.-Z.DuLyuu, Y.-D.Y.-D.LyuuHsu, D.F.D.F.HsuYUH-DAUH LYUU2018-09-102018-09-101992http://www.scopus.com/inward/record.url?eid=2-s2.0-5544242642&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/299414Line digraph iterations and the spread concept-with application to graph theory, fault Tolerance, and routingbook