@article{article40f676b9,
title   = {New abundances of southern planetary nebulae},
author = {Costa, Roberto Dell'Aglio Dias da and Chiappini, C and Maciel, Walter Junqueira and Freitas Pacheco, José Antonio},
year = {1996},
doi = {10.1051/aas:1996112},
journal   = {Astronomy and Astrophysics. Supplement Series}
}