A congruence for the index of a unit of a real abelian number field Kenneth Williams; Kenneth Hardy — 1985 Acta Arithmetica
A congruence relating to class number of complex quadratic fields Kenneth Hardy; Kenneth Williams — 1986 Acta Arithmetica
The class number of pairs of positive-definite binary quadratic forms Kenneth Hardy; Kenneth Williams — 1989 Acta Arithmetica
Determination of ∑ k = 1 p - 1 g a k ² modulo p Kenneth S. Williams; Kenneth Hardy — 1992 Acta Arithmetica
On the evaluation of the Legendre symbol ((A + B√m)/p) Kenneth Williams; Kenneth Hardy; Christian Friesen — 1985 Acta Arithmetica