Modular Hadamard Matrices and Related Designs. - Osvaldo Marrero; Alton T. Butson (J. Comb. Theory A, 1973)

Addition Sets in a Finite Group. - John S. Sumner; Alton T. Butson (J. Comb. Theory A, 1982)

Generalized Relative Difference Sets and Partially Balanced Incomplete Block Designs. - John S. Sumner; Alton T. Butson (J. Comb. Theory A, 1982)

Relative Addition Sets and Partially Balanced Incomplete Block Designs. - John S. Summer; Alton T. Butson (J. Comb. Theory A, 1983)