@article{10_37236_1994,
     author = {Rani Hod and Marcin Krzywkowski},
     title = {A construction for the hat problem on a directed graph},
     journal = {The electronic journal of combinatorics},
     year = {2012},
     volume = {19},
     number = {1},
     doi = {10.37236/1994},
     zbl = {1243.05166},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1994/}
}