@article{DVMG_2005_6_1_a2,
     author = {A. A. Khusainov and V. V. Tkachenko},
     title = {On the homology groups of asynchronous transition systems},
     journal = {Dalʹnevosto\v{c}nyj matemati\v{c}eskij \v{z}urnal},
     pages = {23--38},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DVMG_2005_6_1_a2/}
}