Geodesic
Note on $k$-chromatic graphs
Mathematica Bohemica, Tome 119 (1994) no. 1, pp. 43-48.

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In this paper we characterize $k$-chromatic graphs without isolated vertices and connected $k$-chromatic graphs having a minimal number of edges.
DOI : 10.21136/MB.1994.126206
Classification : 05C15, 05C40
Keywords: chromatic number; connected graph; colouring of a graph; $k$-chromatic graphs; independent set 
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Marcu, Dănuţ. Note on $k$-chromatic graphs. Mathematica Bohemica, Tome 119 (1994) no. 1, pp. 43-48. doi : 10.21136/MB.1994.126206. http://geodesic.mathdoc.fr/articles/10.21136/MB.1994.126206/

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