J4 ›› 2012, Vol. 47 ›› Issue (6): 80-82.
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YANG Lin1, SUN Lei2*
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Key words: ［r, s, t］-coloring; bipartite graph; maximum degree
YANG Lin1, SUN Lei2*. Some ［r,s,t］-chromatic number of graphs[J].J4, 2012, 47(6): 80-82.
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