The populations of planetary nebulae in the direction of the Galactic bulge - Chemical abundances and Wolf-Rayet central starsS. K. Górny, G. Stasińska, A. V. Escudero and R. D. D. CostaA&A, 427 1 (2004) 231-244DOI: https://doi.org/10.1051/0004-6361:20047064
