@article{IVM_1990_5_a8,
     author = {B. A. Rozenfel'd and L. P. Kostrikina and G. V. Stepanova and T. I. Yukhtina},
     title = {Focal-affine spaces},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {60--68},
     year = {1990},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1990_5_a8/}
}