@article{DroLuzMacSot19,
	title = {Note on 3-choosability of planar graphs with maximum degree 4},
	journal = {Discrete Math.},
	volume = {342},
	number = {11},
	pages = {3123--3129},
	year = {2019},
	doi = {https://doi.org/10.1016/j.disc.2019.06.021},
	url = {http://www.sciencedirect.com/science/article/pii/S0012365X19302171},
	author = {Fran\c{c}ois Dross and Borut Lu\v{z}ar and M\'{a}ria Macekov\'{a} and Roman Sot\'{a}k},
}