@article{10_37236_660,
     author = {David Rolnick},
     title = {Trees with an on-line degree {Ramsey} number of four},
     journal = {The electronic journal of combinatorics},
     year = {2011},
     volume = {18},
     number = {1},
     doi = {10.37236/660},
     zbl = {1230.05209},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/660/}
}