@article{10_21136_MB_1993_126046,
     author = {Zelinka, Bohdan},
     title = {A modification of the median of a tree},
     journal = {Mathematica Bohemica},
     pages = {195--200},
     publisher = {mathdoc},
     volume = {118},
     number = {2},
     year = {1993},
     doi = {10.21136/MB.1993.126046},
     mrnumber = {1223485},
     zbl = {0778.05030},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1993.126046/}
}