Authors: Escudero, AV Costa, RDD

Citation: Av. Escudero et Rdd. Costa, Abundances of recently discovered planetary nebulae towards the galactic bulge, ASTRON ASTR, 380(1), 2001, pp. 300-308

Authors: Diaz, MP Costa, RDD Jatenco-Pereira, V

Citation: Mp. Diaz et al., The infrared emission of the shell around Nova V705 Cassiopeiae 1993, PUB AST S P, 113(790), 2001, pp. 1554-1558

Authors: Costa, RDD Pacheco, JAD Idiart, TP

Citation: Rdd. Costa et al., Dredge-up effects in galactic and magellanic planetary nebulae, ASTR AST SS, 145(3), 2000, pp. 467-472

Authors: Costa, RDD Maciel, WJ

Citation: Rdd. Costa et Wj. Maciel, Chemical abundances of newly discovered planetary nebulae in the galactic bulge, ASTRO SP SC, 265(1-4), 1999, pp. 327-329

Authors: Idiart, TP Costa, RDD Pacheco, JAD

Citation: Tp. Idiart et al., Chemical evolution of bulges with nuclear activity, ASTRO SP SC, 265(1-4), 1999, pp. 391-392