Chang, Gerard J.Gerard J.ChangLu, ChanghongChanghongLu2012-03-092018-06-282012-03-092018-06-282011http://ntur.lib.ntu.edu.tw//handle/246246/238889en-USThe L (2, 1)-Labeling Problem on Graphsjournal articlehttp://ntur.lib.ntu.edu.tw/bitstream/246246/238889/-1/43.pdf