  Different conclusions about quark nature of f0(980) based on the analysis of
data on the reaction phi(1020) -> gamma f0(980) make it necessary to perform
detailed comparison of formulae used by various groups for the calculation of
partial widths of radiative decays. We carry out a comparative analysis of
methods of calculation of radiative decays like phi -> gamma f0 and phi ->
gamma eta performed by F.E.Close et al., Phys. Rev. D 65, 092003 (2002), and
A.V.Anisovich et al., Eur. Phys. J. A 12, 103 (2001); Yad. Fiz. 65, 523 (2002).
