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They play a crucial role in astrophysics as standard candles. The chemistry of classical Cepheids in the Milky Way is now quite well-known. Despite a much larger sample, the chemical composition of Magellanic Cepheids has been only scarcely investigated. Aims: For the first time, we study the chemical composition of several Cepheids located in the same populous cluster: NGC 1866, in the Large Magellanic Cloud (LMC). To also investigate the chemical composition of Cepheids at lower metallicity, four targets are located in the","authors_text":"B. Lemasle, E. K. Grebel, F. Primas, G. Bono, G. Fiorentino, J. Pritchard, L. Inno, M. A. T. Groenewegen, M. Romaniello, N. Matsunaga, P. Fran\\c{c}ois, R. Da Silva, S. Pedicelli, V. V. 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