Every 1-planar graph without 4-cycles or adjacent 5-vertices is 5-colorable

Lili Song, Lei Sun. Every 1-planar graph without 4-cycles or adjacent 5-vertices is 5-colorable. Ars Comb., 135:29-38, 2017.

@article{SongS17-3,
  title = {Every 1-planar graph without 4-cycles or adjacent 5-vertices is 5-colorable},
  author = {Lili Song and Lei Sun},
  year = {2017},
  researchr = {https://researchr.org/publication/SongS17-3},
  cites = {0},
  citedby = {0},
  journal = {Ars Comb.},
  volume = {135},
  pages = {29-38},
}