Critical perfect systems of difference sets with the minimum start -- Some aspects of coding theory between probability, algebra, combinatorics and complexity theory -- Generalized SCHUR numbers -- Description of spherically invariant random processes by means of g-functions -- Geometries for the mathieu group M12 -- Orbits and enumeration -- Pictures and skew (reverse) plane partitions -- A canonical partition theorem for chains in regular trees -- Incidence algebras, exponential formulas and unipotent groups -- On irreducible translation planes in odd characteristic, I -- The equivalence classes of the Vasil'ev codes of length 15 -- On the new projective planes of R. Figueroa -- Counting symmetry classes of functions by weight and automorphism group -- Quadruple systems over Zp admitting the affine group -- Arcs and ovals in steiner triple systems -- On dedekind numbers -- Regular sets and quasi-symmetric 2-designs -- Asymptotic 0-1 laws in combinatorics -- Generalized block designs as approximations for optimal coverings -- A graphic theory of associativity and wordchain patterns -- Elusive properties.