GERARD JENNHWA CHANGChang, Gerard J.Gerard J.ChangChen, Jer-JeongJer-JeongChenKuo, DavidDavidKuoLiaw, Sheng-ChyangSheng-ChyangLiaw2018-09-102018-09-102007http://www.scopus.com/inward/record.url?eid=2-s2.0-33947250136&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/329036application/pdf164178 bytesapplication/pdfDistance-two labelings of digraphsjournal article10.1016/j.dam.2006.11.001