Vertex-arboricity of planar graphs without intersecting triangles

@article{Chen2012VertexarboricityOP,
  title={Vertex-arboricity of planar graphs without intersecting triangles},
  author={Min Chen and Andr{\'e} Raspaud and Wei-Fan Wang},
  journal={Eur. J. Comb.},
  year={2012},
  volume={33},
  pages={905-923}
}