%0 Journal Article %A J. Wójcik %T On the congruence $f(x^k) ≡ 0 mod q$, where q is a prime and f is a k-normal polynomial %J Acta Arithmetica %D 1982 %P 151-161 %V 41 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-41-2-151-161/ %R 10.4064/aa-41-2-151-161 %G en %F 10_4064_aa_41_2_151_161