  Recent theoretical studies of the e+ e- --> K + K- gamma process are
described. Three main reaction mechanisms are considered: the initial state
radiation, the final state radiation and the strong interaction between the
outgoing K+ K- mesons. The K+ K- effective mass distributions are derived for
three different models which in past have been used for a description of the e+
e- --> pi+ pi- gamma data. Also the numerical results for the angular photon
and kaon distributions are presented. A new model of the e+ e- --> M_1 M_2
gamma reactions is outlined which can serve for multichannel analyses of the
radiative processes with a production of two pseudoscalar mesons M_1 and M_2.
