@article{SM_1973_20_2_a2,
     author = {\"U. G. Lumiste},
     title = {Projective connections in canonical bundles of manifolds of planes},
     journal = {Sbornik. Mathematics},
     pages = {223--248},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1973_20_2_a2/}
}