1. Handbook of Mathematical Functions;Abramowitz,1970
2. Asymptotic estimates of a general number theoretic function;Buchstab;Mat. Sb.,1937
3. On a problem of Oppenheim concerning ‘Factorisatio Numerorum’;Canfield;J. Number Theory,1983
4. Théorèmes de densité dans Fq[x];Car;Acta Arith.,1987
5. On the number of uncancelled elements in the sieve of Eratosthenes;de Bruijn;Indag. Math.,1950