L. Tóth, P. Haukkanen
The discrete Fourier transform of r-even functions
Acta Universitatis Sapientiae, Mathematica, 3, 1 (2011) 5−25     Full text in PDF
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L. Tóth
A survey of the alternating sum-of-divisors function
Acta Universitatis Sapientiae, Mathematica, 5, 1 (2013) 93−107   Full text in PDF
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