Journal of Combinatorial Theory, Series B
Journal of Combinatorial Theory, Series B > 2009 > 99 > 1 > 84-96
Journal of Combinatorial Theory, Series B > 2009 > 99 > 2 > 378-398
Journal of Combinatorial Theory, Series B > 2009 > 99 > 2 > 324-337
Journal of Combinatorial Theory, Series B > 2009 > 99 > 6 > 869-903