1. On sums of integers having small prime factors II;Balog;Studia Sci. Math. Hungar.,1981
2. On the number of positive integers ≤x and free of prime factors >y;de Bruijn,1951
3. Asymptotically fast factorization of integers;Dixon;Math. Comp.,1981
4. Some problems on the prime factors of consecutive integers II;Erdös,1971
5. Products of integers in short intervals;Erdös;Acta Arith.,1984