@article{DSV15,
	Author = {Z. Dvo\v{r}\'ak and J.-S. Sereni and J. Volec},
	Title = {Fractional coloring of triangle-free planar graphs},
	Journal = {The Electronic Journal of Combinatorics},
	Year = {2015},
        Volume = {22},
        Number = {4},
        pages = {#P4.11}}