On the Nordhaus-Gaddum Problem for the k-Defective Chromatic Number of a Graph.

Nirmala Achuthan N. R. Achuthan M. Simanihuruk On the Nordhaus-Gaddum Problem for the k-Defective Chromatic Number of a Graph. 13-15 2003 15 Electronic Notes in Discrete Mathematics http://dx.doi.org/10.1016/S1571-0653(04)00510-4 db/journals/endm/endm15.html#AchuthanAS03