@article{10_37236_735,
     author = {Walter Stromquist},
     title = {Envy-free cake divisions cannot be found by finite protocols},
     journal = {The electronic journal of combinatorics},
     year = {2008},
     volume = {15},
     doi = {10.37236/735},
     zbl = {1158.91403},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/735/}
}