Faint emission lines in planetary nebulae with a [WC] nucleus
  We present first results from the analysis of a sample of 14 planetary nebulae with [WC] nucleus with detected faint carbon and oxygen recombination lines (RLs). The results are based on deep echelle spectra obtained with MIKE on the 6.5 m Magellan-Clay telescope in Chile. 
J. Garc\'ia-Rojas (IAC, Spain), M. Pe\~na (IA-UNAM, Mexico) and M. T.   Ruiz (U. Chile)
astro-ph.GA