@article{MZM_1974_16_5_a9,
     author = {Yu. B. Rudyak},
     title = {On normal invariants of certain manifolds},
     journal = {Matemati\v{c}eskie zametki},
     pages = {763--769},
     publisher = {mathdoc},
     volume = {16},
     number = {5},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_16_5_a9/}
}