@article{MZM_1989_45_4_a7,
     author = {V. V. Lychagin and V. N. Rubtsov},
     title = {Topological indices of spencer complexes associated with geometric structures},
     journal = {Matemati\v{c}eskie zametki},
     pages = {59--68},
     publisher = {mathdoc},
     volume = {45},
     number = {4},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1989_45_4_a7/}
}