Abstract
Planetary nebulae (PNe) have been used to trace the chemical evolution of galaxies, not only in the Milky Way (Esteban & Peimbert 1995 and references therein) but also in nearby galaxies (Dopita et al. 1997; Richer et al. 1999; Jacoby & Ciardullo 1999). Extragalactic PNe have also been used as secondary distance indicators by means of the planetary nebulae luminosity function (PNLF, Jacoby 1997 and references therein), but for this technique complete samples of PNe up to a given magnitude are an important requirement. We present here the parallel result of a search of candidate LBV objects made in a region of M33.
