Causal Structure of Vacuum Solutions to Conformal (Weyl) Gravity UdeM Preprint ID: UdeM-GPP-TH-98-52 Authors: A. Edery , M. B. Paranjape arXiv: http://xxx.lanl.gov/abs/astro-ph/9808345 Journal Reference: Gen. Rel. Grav. 31 (1999) 1031