The sum of the series of reciprocals of the cubic polynomials with one zero and two different positive integer roots [elektronický zdroj] / Radovan Potůček .
In: Mathematics in education, research and applications. -- ISSN 2453-6881. -- Vol. 8, no. 1 (2022), s. 33-43
https://doi.org/10.15414/meraa.2022.08.01.33-43 .