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Journal of Number Theory > 2018 > 192 > C > 373-385
IEEE Transactions on Information Theory > 2011 > 57 > 7 > 4600 - 4611
Periodica Mathematica Hungarica > 2005 > 51 > 2 > 75-107
Monatshefte für Mathematik > 2004 > 141 > 3 > 197-208
Chinese Science Bulletin > 1998 > 43 > 4 > 275-277