Volume 189, Numbers 1-3, July 1998
: An extremal problem for subset-sum-distinct sequences with congruence conditions.
Jason I. Brown
: Chromatic polynomials and order ideals of monomials.
: On the common nature of spreads and pencils in PG(d, q).
: Toughness and the existence of k-factors. III.
: Enumeration of certain finite semigroups of transformations.