Abundances of Y, Ba, La and Eu vs. metallicities. The sample stars are indicated by black open circles. Halo stars studied by François et al. (2007) and Ishigaki et al. (2013) are represented by red crosses and blue triangles, respectively. The disk stars are shown as blue diamonds (Edvardsson et al. 1993), red open circles (Reddy et al. 2003, 2006), magenta triangles Bensby et al. (2005), green stars (Nissen & Schuster 2011) and yellow squares (Mishenina et al. 2013).
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