D.K. Ghosh and A. Thannippara and S.C. Bagui (1997). Some Latin Squares Type L_i(n) Designs. Journal of Statistical Research, Vol. 31, No. 1, pp. 117-121.
Abstract
In this article a method of construction of partially balanced incomplete block (PBIB) designs with two associate classes is considered, and that leads to the solution of six new latin squares type designs with at most seven replicates or plots per block.