TY  - JOUR
AU  - Kevin Ford
AU  - Richard H. Hudson
TI  - Sign changes in $\pi _{q,a}(x)-\pi_{q,b}(x)$
JO  - Acta Arithmetica
PY  - 2001
SP  - 297
EP  - 314
VL  - 100
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/aa100-4-1/
DO  - 10.4064/aa100-4-1
LA  - fr
ID  - 10_4064_aa100_4_1
ER  -