The planetary nebulae and H II regions in NGC 6822 revisited. Clues to AGB nucleosynthesis Jorge García-Rojas, Miriam Peña, Sheila Flores-Durán and Liliana Hernández-Martínez A&A, 586 (2016) A59 Published online: 26 January 2016 DOI: 10.1051/0004-6361/201527265