Bounds for frequencies of class groups of real quadratic genus 1 function fields Christian Friesen — 2001 Acta Arithmetica
On the evaluation of the Legendre symbol ((A + B√m)/p) Kenneth Williams; Kenneth Hardy; Christian Friesen — 1985 Acta Arithmetica
Class numbers of real quadratic function fields Christian Friesen; Paul van Wamelen — 1997 Acta Arithmetica
Cyclotomy of order 15 over G F ( p 2 ) , p = 4 , 11 (mod 15). Friesen, Christian; Muskat, Joseph B.; Spearman, Blair K.; Williams, Kenneth S. — 1986 International Journal of Mathematics and Mathematical Sciences