@article{VMUMM_1998_4_a3,
     author = {A. A. Prikhod'ko and V. V. Ryzhikov},
     title = {Simple noncommutative counterexamples in joining theory},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {16--19},
     publisher = {mathdoc},
     number = {4},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1998_4_a3/}
}