@article{KUTGS_1984_16_a5,
     author = {T. V. Kirsanova},
     title = {First-order semitangent structures},
     journal = {Trudy Geometricheskogo Seminara},
     pages = {41--47},
     publisher = {mathdoc},
     volume = {16},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUTGS_1984_16_a5/}
}