1. Optimal balanced 28 fractional factorial designs of resolution V, 52 ⩽ N ⩽ 59;Chopra,1975
2. Optimal balanced 28 fractional factorial designs of resolution V with 60 to 65 runs;Chopra,1975
3. Trace-optimal balanced 29 reduced designs of resolution V with 46 to 54 runs;Chopra;J. Indian Statist. Assoc.,1977
4. Some optimal balanced reduced designs of resolution V for 29 series;Chopra,1977
5. Balanced optimal resolution V designs for ten bi-level factors, 56 ⩽ N ⩽ 65;Chopra,1979