Wenan Zang. Proof of Toft s Conjecture: Every Graph Containing No Fully Odd K4 is 3-Colorable. J. Comb. Optim., 2(2):117-188, 1998.
@article{Zang98:1, title = {Proof of Toft s Conjecture: Every Graph Containing No Fully Odd K4 is 3-Colorable}, author = {Wenan Zang}, year = {1998}, tags = {graph-rewriting, rewriting}, researchr = {https://researchr.org/publication/Zang98%3A1}, cites = {0}, citedby = {0}, journal = {J. Comb. Optim.}, volume = {2}, number = {2}, pages = {117-188}, }