P453: Enumerate all maximal $k$-colorable subgraphs in a graph

P453: Enumerate all maximal $k$-colorable subgraphs in a graph
Input:
A graph $G = (V, E)$ and an integer $k \ge 4$.
Output:
All maximal $k$-colorable subgraphs in $G$.
Complexity:
$O(2.4023^{|V|})$ total time and $O(2^{|V|})$ space.
Comment:
Reference:
[Byskov2004] (Bibtex)