The planetary nebulae and H II regions in NGC 6822 revisited. Clues to AGB nucleosynthesisJorge García-Rojas, Miriam Peña, Sheila Flores-Durán and Liliana Hernández-MartínezA&A, 586 (2016) A59DOI: https://doi.org/10.1051/0004-6361/201527265