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Fig. 4

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Comparison between different calibrations used to derive the oxygen abundance from the N2 parameter. All these calibrations are consistent within their intrinsic dispersion (~0.3−0.4 dex), especially in the range of the N2 parameter (−1.0 < N2 <  −0.5) covered by MASSIV galaxies (see Table 2 and Fig. 2).

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