@article{10_37236_6408,
     author = {Heather Smith and L\'aszl\'o Sz\'ekely and Hua Wang and Shuai Yuan},
     title = {On different ``middle parts'' of a tree},
     journal = {The electronic journal of combinatorics},
     year = {2018},
     volume = {25},
     number = {3},
     doi = {10.37236/6408},
     zbl = {1393.05081},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/6408/}
}