%0 Journal Article
%A Kevin Ford
%A Richard H. Hudson
%T Sign changes in $\pi _{q,a}(x)-\pi_{q,b}(x)$
%J Acta Arithmetica
%D 2001
%P 297-314
%V 100
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/aa100-4-1/
%R 10.4064/aa100-4-1
%G fr
%F 10_4064_aa100_4_1