Title says it all. Have tried googling and my college library, but no success so far.
I. Ruzsa, On the cardinality of $A + A$ and $A − A$. In Combinatorics (Keszthely, 1976), Coll. Math. Soc. Bolyai 18, Akadémiai Kaidó (1979), 933–938
2026-04-09 13:26:01.1775741161
Where can I find this article by I. Ruzsa?
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