1. On the spectrum of the forced matching number of graphs;Afshani;Australas. J. Comb.,2004
2. You can't paint yourself into a corner;Albertson;J. Comb. Theory, Ser. B,1998
3. The size of the smallest strong critical set in a Latin square;Bate;Ars Comb.,1999
4. Critical sets for Sudoku and general graph colorings;Cooper;Discrete Math.,2014