1. Optimal balanced 27 fractional factorial designs of resolution V with N≤42;Chopra;Ann. Inst. Statist. Math.,1973
2. Optimal balanced 27 fractional factorial designs of resolution V, 43≤N≤48;Chopra;Sankhya Ser. B,1975
3. Optimal balanced 27 fractional factorial designs of resolution V, 49≤N≤55;Chopra;Comm. in Statistics,1973
4. Optimal balanced 28 fractional factorial designs of resolution V, 37≤N≤51;Chopra;Sankhya Ser. A,1974
5. Balanced optimal 28 fractional factorial designs of resolution V, 52≤N≤59;Chopra,1975