Critical comments on the paper "Crossing $\omega=-1$ by a single scalar   field on a Dvali-Gabadadze-Porrati brane" by H Zhang and Z-H Zhu   [Phys.Rev.D75,023510(2007)]
  It is demonstrated that the claim in the paper "Crossing $\omega=-1$ by a single scalar field on a Dvali-Gabadadze-Porrati brane" by H Zhang and Z-H Zhu [Phys.Rev.D75,023510(2007)], about a prove that there do not exist scaling solutions in a universe with dust in a Dvali-Gabadadze-Porrati (DGP) braneworld scenario, is incorrect. 
Israel Quiros, Ricardo Garcia-Salcedo, Claudia Moreno