A Relation Between Pairwise Balanced and Variance Balanced Block Designs
证明了构造成对平衡区组设计与方差平衡区组设计是等价问题，因此只需研究最简单的成对平衡设计的直接构造方法。
Abstract We show that the problems of constructing pairwise balanced block designs and variance balanced block designs are equivalent. This provides incentive to study only the direct construction for the simplest of these designs—namely, pairwise balanced designs.