@article{CMUC_1993_34_2_a22,
     author = {Laflamme, Claude},
     title = {Partitions of $k$-branching trees and the reaping number of {Boolean} algebras},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {397--399},
     year = {1993},
     volume = {34},
     number = {2},
     mrnumber = {1241749},
     zbl = {0783.06009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1993_34_2_a22/}
}