@article{IVM_2002_11_a2,
     author = {A. A. Ermolitskii},
     title = {The hat theorem and problems of the classification of structures on {Riemannian} manifolds},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {27--31},
     publisher = {mathdoc},
     number = {11},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2002_11_a2/}
}