On sums and differences of primes and squares
Compositio Mathematica, Tome 13 (1956-1958), pp. 103-112. 
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Zulauf, Achim. On sums and differences of primes and squares. Compositio Mathematica, Tome 13 (1956-1958), pp. 103-112. http://archive.numdam.org/item/CM_1956-1958__13__103_0/

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