1. On the sequence [nα], n = 1, 2,…;Bang;Math. Scand.,1957
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3. On a problem concerning congruence systems;Erdös;Mat. Lapok,1952
4. The bracket function and complementary sets of integers;Fraenkel;Canad. J. Math.,1969
5. Complementing and exactly covering sequences;Fraenkel;J. Combinatorial Theory, Ser. A,1973