Comment on ``Next-to-next-to-leading order vacuum polarization function
of heavy quark near threshold and sum rules for $b \bar b$ system'' and
``Next-to-next-to-leading order relation between $R(e^+e^-\to b\bar b)$ and
$Γ_{\rm sl}(b\to clν_l)$ and p
Physics – High Energy Physics – High Energy Physics - Phenomenology