@inproceedings{inproceedings031558fe,
title   = {Chemical abundances of newly discovered planetary nebulae in the galactic bulge},
author = {Costa, Roberto Dell'Aglio Dias da and Maciel, Walter Junqueira and Freitas Pacheco, José Antonio},
year = {1998},
publisher = {Observatoire de Paris},
booktitle   = {Les Rencontres de l'Observatoire. Galaxy evolution : connecting the distant universe with the local fossil record}
}