Blue-violet region of sample spectra that have been employed for spectral classification of our sample stars. The panels illustrate the SAO RAS spectrum of KIC 5473826 (spectral type B9 V SiCr; upper panel) and the LAMOST DR2 spectra of KIC 8773445 (spectral type A0 IV SiCrSrEu; middle panel) and KIC 9541567 (spectral type A9 V SrCrEu; lower panel). Some lines of interest are indicated. Please note that at this resolution, the CaH line is blended with Hϵ. The listed spectral types are from this investigation (cf. Table 4).