Comment on "Maximal planar networks with large clustering coefficient   and power-law degree distribution"
  This Comment corrects the error which appeared in the calculation of the degree distribution of random apollonian networks. As a result, the expression of $P(k)$, which gives the probability that a randomly selected node has exactly $k$ edges, has the form $P(k)\propto 1/[k(k+1)(k+2)]$. 
Zhi-Xi Wu, Xin-Jian Xu and Ying-Hai Wang