@inproceedings{inproceedings6abb234a,
title   = {Warmers source of ionization and n enrichment in agn},
author = {Cid Fernandes, R and Dottori, H A and Gruenwald, Ruth Bomfim and Viegas, Sueli Maria Marino},
year = {1992},
publisher = {Kluwer},
booktitle   = {International Astronomical Union Symposium. theellar Populations of Galaxies}
}