Dan Archdeacon. Face colorings of embedded graphs. Journal of Graph Theory, 8(3):387-398, 1984. [doi]
@article{Archdeacon84, title = {Face colorings of embedded graphs}, author = {Dan Archdeacon}, year = {1984}, doi = {10.1002/jgt.3190080307}, url = {http://dx.doi.org/10.1002/jgt.3190080307}, researchr = {https://researchr.org/publication/Archdeacon84}, cites = {0}, citedby = {0}, journal = {Journal of Graph Theory}, volume = {8}, number = {3}, pages = {387-398}, }