@article{IVM_2008_10_a0,
     author = {Yu. B. Ermolaev},
     title = {A realization of {Cartan} extensions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--16},
     year = {2008},
     number = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2008_10_a0/}
}