Extreme forms and cyclotomy

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[2]  Two Remarks On Extreme Forms , 1955, Canadian Journal of Mathematics.

[3]  Chao Ko.  On the positive definite quadratic forms with determinant unity , 1939 .

[4]  The Perfect and Extreme Senary Forms , 1957, Canadian Journal of Mathematics.

[5]  Note On Extreme Forms , 1955, Canadian Journal of Mathematics.

[6]  R. E. O’Connor,et al.  The construction of integral quadratic forms of determinant 1 , 1944 .