%0 Journal Article %A Andrew Long %T Factorization of irreducible polynomials over a finite field with the substitution $x^(q^r) -x$ for x %J Acta Arithmetica %D 1973 %P 65-80 %V 25 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-25-1-65-80/ %R 10.4064/aa-25-1-65-80 %G en %F 10_4064_aa_25_1_65_80