@article{MASLO_1977__27_3_a9,
     author = {Zelinka, Bohdan},
     title = {The lattice of all subtrees of a tree},
     journal = {Mathematica slovaca},
     pages = {277--286},
     publisher = {mathdoc},
     volume = {27},
     number = {3},
     year = {1977},
     mrnumber = {536145},
     zbl = {0357.05035},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1977__27_3_a9/}
}