Pang, Shanqi; Guo, Xuebin; Yan, Rong The simple method for calculating matrix image of orthogonal array and its elementary proof. (Chinese. English summary) Zbl 1120.05302 J. Henan Norm. Univ., Nat. Sci. 34, No. 4, 5-8 (2006). MSC: 05B15 Orthogonal arrays, Latin squares, Room squares Keywords:permutation matrix; projection matrix; matrix image PDFBibTeX XMLCite \textit{S. Pang} et al., J. Henan Norm. Univ., Nat. Sci. 34, No. 4, 5--8 (2006; Zbl 1120.05302)