%0 Journal Article %A J. Wójcik %T A refinement of a theorem of Schur on primes in arithmetic progressions %J Acta Arithmetica %D 1965 %P 433-436 %V 11 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-11-4-433-436/ %R 10.4064/aa-11-4-433-436 %G en %F 10_4064_aa_11_4_433_436