XMM-Newton reveals the intrinsically X-ray weak nature of the quasar PG   0043+039
  This paper was withdrawn due to a misidentification of the source. 
L. Ballo (1), E. Piconcelli (2), N. Schartel (1), C. Vignali (3) ((1)   ESAC-ESA, Madrid, Spain; (2) Obs. Roma, Italy; (3) B...