Comment on `The Newtonian force experienced by a point mass near a finite cylindrical source'
We compare the computation times and precisions of three expansions for the gravitational potential. The evaluation of the series by Selvaggi et al (2008 \textit{Class. Quantum Grav.} \textbf{25} 015013) is time-consuming to be applied to the gravitational constant ($G$) or STEP experiments.
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