%0 Journal Article %A Andrzej Schinzel %T On primitive prime factors of Lehmer numbers III %J Acta Arithmetica %D 1968 %P 49-70 %V 15 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-15-1-49-70/ %R 10.4064/aa-15-1-49-70 %G en %F 10_4064_aa_15_1_49_70