Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@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/} }
Zelinka, Bohdan. The lattice of all subtrees of a tree. Mathematica slovaca, Tome 27 (1977) no. 3, pp. 277-286. http://geodesic.mathdoc.fr/item/MASLO_1977__27_3_a9/