Tentative separation between thick and thin discs in the [α/Fe] –[Fe/H] plane for allsample stars (left panel), stars with Li measurements (central panel), and stars with Li upper limits (right panel). In all panels the vertical and horizontal dashed lines indicate solar values. Filled blue dots represent the Galactic thin disc stars while open orange circles are the thick disc objects. The cyan line shows the division proposed by (Adibekyan et al. 2012).