... environments

Appendices A-D are only available in electronic form at http://www.edpsciences.org

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... Ti

Although the nucleosynthesis theory of Ti is not well understood, this element appears to be enhanced in most bulge stars by $\sim$0.3 dex (e.g., see McWilliam & Rich 2004).

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...$[\alpha/$Fe]

$[\alpha/$Fe] represents the ratio between the $\alpha$-elements abundances and Fe.

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...$[\alpha/$Fe]

These authors do not use this term but instead $[{\rm E}/{\rm Fe}]$, being E the abundance of the enhanced elements, which does not coincide completely with the $\alpha$elements.

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