1. H. Davenport. Multiplicative number theory. Revised and with a preface by Hugh L. Montgomery. In: Graduate Texts in Mathematics, Vol. 74, 3rd edn. Springer, New York (2000).
2. P.D.T.A. Elliott. Probabilistic number theory. I. Mean-value theorems. In: Grundlehren der Mathematischen Wissenschaften (Fundamental Principles of Mathematical Science), Vol. 239. Springer, New York (1979).
3. Friedlander J., Iwaniec H.: On Bombieri’s asymptotic sieve. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, 5(4), 719–756 (1978)
4. A. Granville and K. Soundararajan. Multiplicative number theory: the pretentious approach.
5. Granville A., Soundararajan K.: Decay of mean values of multiplicative functions. Canadian Journal of Mathematics 55(6), 1191–1230 (2003)