@article{articlebdc24a9c, title = {Dredge-up effects in galactic and magellanic planetary nebulae}, author = {Costa, Roberto Dell'Aglio Dias da and Freitas Pacheco, José Antonio and Idiart, Thais Eunice Pires}, year = {2000}, doi = {10.1051/aas:2000252}, journal = {Astronomy and Astrophysics Supplement Series} }