- Coy L. May, Groups of even real genus, J. Algebra Appl. 6 (2007), no. 6, 973–989.[MR]
- Coy L. May, The real genus of 2-groups, J. Algebra Appl. 6 (2007), no. 1, 103–118.[MR]
- Coy L. May and Jay Zimmerman, The groups of symmetric genus σ ≤ 8, Comm. Algebra 36 (2008), no. 11, 4078–4095.[MR]
- Coy L. May and Jay Zimmerman, The symmetric genus of groups of odd order, Houston J. Math. 34 (2008), no. 2, 319–338.[MR]