"design theory" . "Combinatorial design#balanced tournament design" . . "combinatorics" . "Combinatorial Designs" . "Combinatorial design" . . "combinatorial-design" . . "Combinatorial design" . "Combinatorial Design Theory" . . "combinatorial design" . . "combinatorial design theory" . . "designs and configurations" . "pairwise balanced designs" . . . . "designs" . . . . "(''n'',''r'',''k'',''r'')-lotto design" . . . "Quasi-symmetric designs" .