Chnag, G.J.G.J.ChnagJuan, S.T.S.T.JuanLiu, D.D.-L.D.D.-L.Liu2010-10-152018-06-282010-10-152018-06-282001-01http://ntur.lib.ntu.edu.tw//handle/246246/216089en-USNo-hole 2-distance colorings for unit interval graphsjournal article