On a problem of Davenport and Schinzel
On sets of integers containing k elements in arithmetic progression
On the difference of consecutive terms of sequences defined by divisibility properties, II
On a conjecture of Erdös and Heilbronn
Über ein Problem von Erdös und Moser
On a problem of P. Erdos and S. Stein
An Upper Bound on the Number of Planar K-Sets.
The Number of Different Distances Determined by a Set of Points in the Euclidean Plane.
On the divisibility properties of integers (I)
On the divisibility properties of sequences of integers (II)
Some additive and multiplicative problem sin number theory
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