@article{SM_1972_18_2_a12,
     author = {A. B. Sosinskii},
     title = {The homology of a~symmetric relation},
     journal = {Sbornik. Mathematics},
     pages = {342--350},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1972_18_2_a12/}
}