On the maximum number of constraints for s-symbol balanced arrays of strength t
Sumiyasu Yamamoto, Masahide Kuwada, Fuzhi Yuan · Communication in Statistics- Theory and Methods · 1985
Several upper bounds on the maximum number of constraints for s-symbol balanced arrays of strength t are given. Some bounds derived here include the results obtained by Rafter and Seiden (1974), Chopra (1982, 1983) and Saha, Mukerjee and Kageyama (1983).