1. On those numbers in an arithmetic progression all prime factors of which are small in magnitude;Buchstab;Doklady Akad. Nauk. SSSR (N.S.),1949
2. On the number of uncancelled elements in the sieve of Eratosthenes, Proc. Kon. Ned. Akad;de Bruijn;Wetensch. 52, 803 -812 (1950) = Indagationes Mathematicae,1950
3. The asymptotic behaviour of a function occuring in the theory of primes;de Bruijn;Submitted to Proc. Indian Math. Soc., Jan,1951
4. On the largest prime divisors of numbers;Chowla;Journal Indian Math. Soc. (N.S.),1947
5. The number of positive integers < x and free of prime divisors > xc, and a problem of S. S. Pillai;Ramaswami;Duke Math. Journ,1949