Comments on "Perspectives on Galactic Dynamics via General Relativity"
  In this comment we question some arguments presented in astro-ph/0512048 to refuse the presence of an singular mass surface layer. In particular, incorrect expressions are used for the disk's surface mass density. We also point out that the procedure of removing the descontinuity on the $z=0$ plane with a region of continuous density gradient generates other two regions of descontinuities with singular mass surface layers making the model unrealistic. 
D. Vogt and P.S. Letelier