@inproceedings{inproceedings8d5ae123,
title   = {Carbon to helium ratio the wind of central stars of planetary nebulae with wc spectrum},
author = {Freitas Pacheco, José Antonio and Costa, Roberto Dell'Aglio Dias da and Araujo, F X and Petrini, D},
year = {1992},
publisher = {Kluwer},
booktitle   = {International Astronomical Union Symposium. Arochemiry of Cosmic Phenomena}
}