@article{MZM_2021_109_5_a4,
     author = {A. A. Grigor'yan and Yu. V. Muranov and R. B. Jimenez},
     title = {Homology of {Digraphs}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {705--722},
     publisher = {mathdoc},
     volume = {109},
     number = {5},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2021_109_5_a4/}
}