Fig. 9
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Diagnostic plot [Ca/Mg] as a function of [Ca/H] for the stars of 16 GCs in the present study (empty grey points). In the left panel, green filled circles are stars in NGC 2808 from Carretta 2015, in the middle and right panels, red and blue filled circles are stars in NGC 7078 and NGC 6752, respectively, from the present work.
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