1. Class numbers and unit signatures;Armitage;Mathematica,1967
2. Representation Theory of Finite Groups and Associative Algebras;Curtis,1962
3. D. Davis, On the distribution of the signs of the conjugates of the cyclotomic units in the maximal real subfield of the qth cyclotomic field, q a prime, Thesis, California Institute of Technology, 1969
4. Computing the number of totally positive circular units which are squares;Davis;J. Number Theory,1978
5. Circulant Matrices;Davis,1979