@article{MZM_1980_27_4_a14,
     author = {Ya. S. Soibel'man},
     title = {Computation of a topological invariant connected with partition of figures into subsets of smaller diameter},
     journal = {Matemati\v{c}eskie zametki},
     pages = {647--649},
     publisher = {mathdoc},
     volume = {27},
     number = {4},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1980_27_4_a14/}
}