%0 Journal Article %A Cohen, Stephen D. %T Some arithmetical functions in finite fields %J Glasgow mathematical journal %D 1970 %P 21-36 %V 11 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S001708950000080X/ %R 10.1017/S001708950000080X %F 10_1017_S001708950000080X