GERARD JENNHWA CHANG2018-09-102018-09-102001http://www.scopus.com/inward/record.url?eid=2-s2.0-0348238535&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/291977No-hole 2-distant colorings for unit interval graphsjournal article